Monkey D. Luffy/Relationships

Family


Luffy's known family members consists of some of the most powerful and infamous people in the world. His grandfather is a famous Marine hero and his father is the world's most wanted man. In his childhood, Luffy befriended two boys who became his sworn brothers.

Monkey D. Dragon


For years, Luffy was unaware that he had parents as he was raised solely by his grandfather. When Garp visited him, he informed Luffy that Dragon the Revolutionary is his father. Luffy was ignorant of his father's reputation until Robin informed him that his father is currently the most wanted criminal in the world. The two have yet to talk to each other and their only meeting was when Dragon rescued Luffy from being captured by Smoker in Loguetown. Dragon apparently cares for his son's life because he saved him in Loguetown. Dragon seems to expect great things from Luffy, much like his grandfather. However, unlike Garp, Dragon seems to be in favor of Luffy's decision to become a pirate. It has not been mentioned about how Luffy feels toward Dragon and his ideals, but he is fine with people knowing that he is Dragon's son while acknowledging the revolutionary as his father.

When his connection to Dragon was made worldwide at Marineford, Luffy was unfazed by it but because of his family ties, he has been marked as a deadly element of the future.

On the way to Whole Cake Island, Luffy was able to see his father's face clearly for the first time in his life while reading a newspaper. Though comically surprised, Luffy casually remarked that Dragon does not look like him before admitting to being more worried about Sabo than his father after hearing about the Blackbeard Pirates' attack on the Revolutionary Army's base.

Portgas D. Ace


"Fire-Fist" Ace was one of Luffy's sworn brothers along with Sabo. The two were not related by blood and Luffy is aware that Ace's father was Gol D. Roger. When they first met, Ace was initially hostile to Luffy, even spitting at him before they were introduced to each other. Though Ace was aloof towards him, Luffy constantly tried to make Ace his friend, following him everywhere and trying to make up. Eventually, after learning that Luffy was also alone after saving him from Porchemy, Ace finally befriended Luffy.

They grew up together and fought every day, with Ace always winning even though Luffy had eaten a Devil Fruit. Luffy displayed no grudge against Ace for always winning, but proclaimed during the war in Marineford that he will eventually surpass Ace one day. Ace originally had little faith in Luffy's abilities until he saw Luffy use Haoshoku Haki and was amazed by his brother's potential.

Ace was protective of Luffy from Garp's harsh training and treatment even going as far as to insult Garp to stop hurting Luffy. As for Luffy, this protective streak is reciprocated, leading to him embarking on a rescue mission to save Ace from Impel Down after hearing of Ace's capture and subsequent imprisonment there. While they are extremely loving brothers to each other, Luffy always made Ace angry and worried by doing reckless things. As such, Ace readily believed Boa Hancock when she told him that Luffy had broken into the prison. Even near his death, Ace grew angry with Luffy's reckless infiltration of Impel Down, while the endangered Luffy was worried about Ace's safety as well.

Luffy's devotion and love for his brother were shown to the extremes when he fought at the war at Marineford, stating that he would save Ace even if it kills him. Though many were heartbroken when Ace died, none took it harder than Luffy, who was so devastated that he suffered a mental collapse and became unresponsive to his surroundings, and would have been killed by Akainu if others had not defended him. When Luffy woke up, all he could do was scream in agony and cry and wish it was all a nightmare, and that he would wake up soon. The loss of his brother also had a crucial impact on Luffy, leading him to think that he was not worthy of becoming the Pirate King for the first time in his life. He only came out of his depression after Jinbe made him realize that Ace had entrusted Luffy's safety to his crew. After the two year timeskip, Luffy has fully gotten over his grief as he was able to talk about Ace's death freely, although his hatred for the man who killed his brother apparently still remains. Nonetheless, Luffy accepts Ace's fate, but also finds comfort in the fact that Ace truly believed he could become the Pirate King. Donquixote Doflamingo would later take possession of Ace's Mera Mera no Mi, which he used to lure Luffy to him, knowing that Luffy would never allow anyone to gain the powers that once belonged to his beloved brother. During the tournament for Ace's Devil Fruit, Luffy has shown that he doesn't like it when Ace's death is made fun of. When Don Chinjao said that it was a wise move of the Marines to execute Ace, this angered Luffy to the point that he struck Chinjao with a Gomu Gomu no Thor Elephant Gun.

Monkey D. Garp


Though the two of them get along fine, Luffy is terrified of his grandfather Garp due to the extreme training Garp put him through in his younger years to make him a strong Marine, as well as Garp's tendency to punch Luffy to discipline him.

During the Post-Enies Lobby Arc, Luffy was shocked to see Garp again and told his crew not to fight him. Garp had high expectations for Luffy, but was dismayed that Luffy did not share his plans for the future. Luffy was also ignorant of his grandfather's reputation until his crew informed him that his grandfather once fought the Pirate King Gol D. Roger. Despite their rough meeting, Garp and Luffy showed that they can be civil with each other and the latter even told Luffy about his father.

However, Garp respects Luffy as a great person, even if he is a pirate and is proud of Luffy's strength. Garp is familiar with Luffy's personality, saying that Luffy is not the type of person to brag about defeating someone, arguing that Kuma did not need to kill Luffy to keep Moria's defeat a secret.

When Luffy entered the Battle of Marineford, Garp looked shocked and horrified at the sight of his grandson entering the fearsome battle. Later, as the battle raged on, Garp merely looked resigned as his grandson furiously made his way to the execution platform. Garp was not too surprised to see Luffy use Haoshoku Haki even stating he inherited it after all. When Luffy came close to the platform, Garp stood in his way in the name of his Marine duties. Luffy was hesitant to go through with attacking his grandfather and told him to move but saw no other choice.

However, in the end, Garp chose family over his duties as he allowed Luffy to hit him and reach the execution platform to save Ace.

After the timeskip, Luffy has not seen his grandfather but did show eagerness to see him after Chinjao mentioned him.

Curly Dadan
"Dadan, I hate mountain bandits... but I like you guys!"

The mountain bandit, Curly Dadan, is Luffy and Ace's foster mother. She had been blackmailed by Garp into taking care of him, and she did not seem pleased with having Luffy as her surrogate son due to being already occupied with the troublesome Ace. Luffy, in turn, did not seem to like the Dadan Family anymore than they liked him due to his run-in with the bandit Higuma. However, as time passed, they came to care for each other, with Dadan coming in to save Luffy from Bluejam, and Luffy worrying for Dadan's safety. Before leaving her, Luffy annoyed her by saying that he hates bandits but makes her cry tears of joy when he states that he likes her.

After the death of Ace, Dadan was deeply concerned with how Luffy must be grieving but swore to keep cheering him on. After Luffy's return from his two-year absence, Dadan and her fellow bandits were overjoyed and they were proud of him after he defeated Doflamingo.

Sabo


Like Ace, Sabo was initially annoyed with Luffy when they first met. At first, Sabo wanted to kill Luffy for discovering his and Ace's plans. However, when Luffy refused to give away the location of Ace and Sabo's treasure to Porchemy, Sabo and Ace rescued and befriended him. Like with Ace, Luffy is very close to Sabo, who had a tendency to defend or save Luffy when they were hunting together.

Sabo, Luffy, and Ace shared a drink, making them official brothers and establishing the deep bond between the three. According to Luffy, Sabo was a nicer brother to him than Ace. When Sabo's father came to take him back, Sabo willingly returned with him so that Luffy and Ace would be safe from the hired pirate Bluejam. When Sabo's apparent death was reported by Dogra, Luffy grieved by crying all night until he fell asleep. Luffy only snapped out of this sorrowful moment when Ace told him to live proudly, as Sabo wanted. Sabo's supposed death was also one of the main motivations for Luffy to become stronger.

When Sabo and Luffy were reunited after twelve whole years, Luffy did not recognize him at first and even challenged him after hearing he would not let him have Ace's Mera Mera no Mi. However, he reacted in shock upon realizing the latter's identity. Luffy quickly embraced Sabo while crying joyfully after finding out his remaining brother was alive and well. Sabo thanked Luffy for surviving the Battle of Marineford and asked for permission to eat the Mera Mera no Mi which Luffy unhesitatingly allowed. When Jesus Burgess attempted to kill Luffy, Sabo quickly intercepted him and Luffy was happy to see his brother again even more so after seeing that Sabo inherited Ace's power. When Sabo was preparing to leave Dressrosa, he left Luffy a Vivre Card and entrusted Luffy's safety to the Straw Hats similar to what Ace once did in the past.

After learning about the Blackbeard Pirates' attack on the Revolutionary Army's base, Luffy expressed worry for Sabo's safety and only calmed down when Pedro mentioned the possibility of Sabo being okay due to there being no mention of him being killed or captured.

Straw Hat Pirates
To find such loyal companions... your son is indeed amazing... Dragon.



Because he is the captain and recruited all the crew mates personally, Luffy cares tremendously for his crew. As far as captaincy is concerned, Luffy sees his other crew mates as equals in contrast to other pirate captains, who mostly sees theirs as subordinate underlings. His crew mostly calls him by name, rather than with an honorific or "Captain". In fact, Luffy is the only one that is generally beaten up and ordered around on the ship. Nami never hesitates to give Luffy a beating for his idiocy (albeit, in comedic fashion). This is something of a contrast between him and his grandfather's way of commanding a group. While Garp responds by mercilessly beating up his subordinates for showing him disrespect and to keep them in line, Luffy lets their disrespect slide. Luffy only pulls rank when he wants to go "adventuring" despite what his crew thinks, such as the time he wanted to go to Skypiea and following the swaying needle to the New World, or making the more important decisions such as giving up on the Going Merry.

Much like Shanks, Luffy is the kind of benevolent pirate captain who does not seek to actively harm others unless they give him and his crew (or anyone he cares about) a very good reason to. However, during the Jaya arc he was willing to start a fight with Blackbeard over a difference in opinion on pie. As the Straw Hat Captain, Luffy has utmost faith in his crew. In fact, after the timeskip, Luffy's trust grew even more as shown when he overheard that his crew were being apprehended by the Ryugu Kingdom's guards, he did not seem perturbed at all, and was confident that his friends could take care of themselves. This is seen once more when he accepts Law's proposal for an alliance. When his crew confronts him about it, he claims that even if Law is untrustworthy, he is not worried because of the faith he has in his crew and the training they put in during the time-skip, eliciting a shock from them before reacting positively to his praise. Luffy also has the rare ability to cheer up just about anyone with his idiotic antics, even pulling a smile every now and then from the serious Zoro and Robin.

While often frustrated at Luffy's immature and impulsive nature, his crew trust him unconditionally. They also show great concern for him when he is put in life-threatening situations. Their loyalty was high to the point where all of them refused to hand him over to Bartholomew Kuma, even though the latter promised to spare their lives just for the captain's life. It can be said that Luffy has both greatly impacted and changed the lives of each of his crew members and is typically the one cited as having revived each of their dreams.

What a capable captain... If only a certain idiot could have heard you.

During his battle with Lucci, Luffy kept fighting him despite the danger his crew was in (courtesy of Lucci flooding the tunnel). Luffy knew that if he let Lucci get away, he would kill all of his crew. This focus caused Lucci to compliment him on his leadership skills.

Though all of Luffy's crew try to look out for him (especially at the requests of Luffy's older brothers Ace and Sabo), Luffy's reckless and carefree attitude might cause a crew member to wonder why they followed such a crazy captain on numerous occasions. However, by the end of the day (or adventure), none of them truly regret following him and generally enjoy being in the crew. He likes to make fun of others' imperfections and character traits, such as Zoro's bad sense of direction (though he is barely better). Luffy also likes to comically imitate his crew members, and sometimes even himself; despite nearly dying from being frozen by Aokiji, he covered himself in flour and hopped while frozen in a pose to imitate the experience.

His level of trust and friendship with his crew is so high that he would even offer them a chance to eat the Mera Mera no Mi, which once belonged to his beloved foster brother, while the thought of it ending up with some stranger was unbearable.

Luffy has a very bizarre relationship with his signature Straw Hat, which was given to him by Shanks on the condition that he takes care of it, never loses it, and only returns it when he becomes better than Shanks. The hat cements Luffy's promise to become the Pirate King and has been with him for over ten years. Subsequently, it has been repaired several times (mostly by Nami). In the beginning of the series, Luffy let people hold the hat during battle for fear of losing it, and whoever held it was considered to have his highest trust and respect. He has only entrusted it to Zoro when entering the Grand Line, Usopp during the Davy Back Fight, and to Nami during the Arlong Park, Drum Island, Jaya, and Skypiea Arcs. A string was later added so that he could keep his hat on without losing it.

The straw hat became an identifying marker for him by his enemies, to the point where his nickname became "Straw Hat Luffy" and his crew the "Straw Hat Pirates". Luffy is almost never seen without it, even when sleeping or fighting. He is very protective of the hat that he is willing to hurt anyone who tries to damage it.

Roronoa Zoro


The first crew mate to join the Straw Hat Pirates was Zoro, a bounty hunter who decided to serve under Luffy as a pirate after he saved his life from a dishonorable death at the hands of a corrupt Marine, but vowed if Luffy ever got in the way of his ambition, he will kill him. Later in the series, they have developed a very close bond which is underlined by their tremendous amount of trust and respect for one another, to the point where Zoro is willing to die for Luffy's dream to become Pirate King and sacrifice his own dream of becoming the world's greatest swordsman. Though, he still hints at Luffy needing to uphold his duties and capabilities as captain, such as when he jokes that if Luffy were not at least able to defeat at least half of the New Fish-Man Pirates, he'd have to step down as captain of the crew.

Luffy and Zoro are known to occasionally mock each other; Luffy will laugh heartily whenever Zoro gets lost or does something noticeably stupid, though he is usually worse in that respect. Zoro like the rest of the crew will reprimand Luffy for his idiotic habits. When Luffy and he battled in Whisky Peak (as Luffy thought Zoro was attacking innocent people when they were actually bounty hunters), Zoro was exasperated with his Captain for not understanding the situation and decided to not hold back. When the battle was stopped by Nami, who explained the situation to Luffy, he laughed as he thought Zoro attacked people for giving food he did not like to which Zoro responded angrily "Who do you think I am?".

In times of trouble, Zoro has also served as an adviser to Luffy as to what course of action they should take. This is best illustrated during the events at Water 7 when Luffy was initially willing to have Usopp rejoin straight away, only for Zoro to explain what that would mean for the crew. Luffy accepted Zoro's determination as he denied Usopp's comeback when the liar wasn't admitting his stubbornness. Luffy has great trust and admiration for Zoro's supreme sword skills such as when they were onboard Rocket Man and obstacles were in their way Luffy states to the Franky Family "Zoro's got this" as the Swordsmen sliced everything (including T-Bone) out of their way.

At Thriller Bark, Zoro decided to give up his life to save Luffy from Bartholomew Kuma because he was ready to die for the dream of his captain. Kuma found this trust admirable as he was moved by Zoro's compassion.

After the timeskip, Luffy and Zoro still get along with Zoro being amazed by Luffy's ability to use Haoshoku Haki. In Punk Hazard, Zoro was also the one to realize Luffy's recklessness would have to stop, going out of his way to reprimand his captain for behaving that way and making it clear they needed to take things more seriously in order to survive the New World. Luffy understood Zoro's point and apologized to him. During Zou Arc, Luffy mocked Zoro for acting like he doesn't care about certain crewmembers like in Zou when Sanji was in a predicament and Luffy found Zoro listening outside the door he joked that Zoro was worried about Sanji, the Swordsman responded by saying "Don't make me kick your ass". When they reunited in Wano, Luffy was pleased to see him again and they fought against the Beast Pirates

Nami
Though she respects him as a captain, Nami often scolds Luffy's air headedness, but he never gets angry at her, even when she manipulates him, although there has been a few times in which they bicker with each other. Luffy also has no problems taking orders from her when it comes to the navigation of the ship. Even though he is made of rubber, Luffy can still get hurt by Nami's physical attacks as she beats him up either by angering or annoying her. Despite the slight conflict occurring because of his recklessness, she has deep trust in him and views him as a great source of strength and comfort. When Nami fell sick just prior to the Drum Island Arc, and without a doctor on board, Luffy desperately tried to help Nami the only way he knew how. He consistently stayed by her side, and attempted to get her to smile, becoming sad when he wasn't successful, even trying to keep the promise he made to Genzo by taking care of her and make her happy on the journey. When it was determined that the only way to get her treatment was actually climbing the Drum Mountains by foot, she implicitly trusted Luffy to get her there safely. Luffy bare handedly climbed the 5000 meter tall mountain to get her to a doctor, with enhanced pain caused by the reaction of rubber to cold.

Even though Nami betrayed him when she stole their ship and treasure during the chaos at Baratie, Luffy never changed his opinion of her, insisting that she become the navigator in his crew. Oddly, he seems to place the most trust in her out of all of his crewmates - after learning from Johnny that he witnessed Nami killing Usopp, he refused to believe him, even going so far as to threaten him with a beating for "lying". In a similar situation in Whisky Peak, where he was told that Zoro had killed and hurt the people who fed him, Luffy outright attacked him, even though that information came from an unreliable source (unlike the case with Nami). While he is normally oblivious, Luffy is still occasionally wary of angering Nami. When he heard Absalom was going to marry her Luffy simply said "He wants to marry Nami? He's brave".

Even without knowing anything about the horrible past she suffered, seeing her cry was enough for Luffy to place his hat on her head to console her as he went berserk on Arlong and his crew, similarly to how Gol D. Roger acted. Nami is the only person that Luffy places his straw hat on as source of comfort to her.

When they reunited after two years, Nami has become more tolerant of Luffy's reckless behavior and amazed by his strength after he defeated the Kraken. During the trip to Whole Cake Island, she questioned Luffy on his family ties after learning about Sabo. Later in the arc, Nami did not hesitate to come to his aid by helping him in facing Cracker and declared he will be the future Pirate King. She also doesn't tolerate anyone who insults Luffy, as she slapped Sanji after he put up a convincing act of newfound royal bigotry and assaulted a non-retaliating Luffy viciously.

Usopp


Luffy's relationship with Usopp is perhaps the closest example on the ship of a sibling relationship because of their similar pasts and fun loving mindsets. Despite his fears, Usopp at times finds the strength within himself by following the example set by Luffy and the rest of the crew. When he exclaimed that he was good with cannons, Luffy immediately made him the gunner of the ship. Usopp and Luffy are also destined to cross paths with the Red Hair Pirates in the future in some manner; Luffy to reunite with Shanks, and Usopp with his father. Luffy and Usopp are notorious for being the "idiots of the crew" and will set bad example for the youngest Chopper. During the Davy Back Arc he showed a strong trust in Usopp by allowing him to care for his Straw Hat while Luffy sported the afro, something he'd only allowed Nami to do before.

Their relationship faced a great turmoil when Luffy was forced to fight Usopp during the tragic events Of Water 7 over the fate of the broken Going Merry, and Luffy is emotionally distraught. Luffy engages in brutal combat with his best friend and took a surprising amount of damage from the Sniper's tricks before finally ending the battle with a Gomu Gomu No Bullet. Though Usopp lost the fight, Luffy gives him what he wanted (the Going Merry) and he and Usopp cried deeply over their briefly broken friendship. Luffy remained depressed along with Chopper and Nami about the event, but after the events of Enies Lobby tearfully and joyfully accepted him back when he later apologized and begged to rejoin the crew. He was willing to do this without an apology however, due to how much he missed him.

Usopp felt deep sorrow for Luffy when he lost his brother, and dedicated his timeskip training to getting stronger for him. After their reunion, Usopp now has a lot more confidence in his ability, and so does Luffy. He stops Trafalgar Law from attempting to apprehend Caesar Clown after the events of Punk Hazard, reminding him that the sniper said he could handle it. He displays this again during Dressrosa, when he doesn't question in the slightest that Usopp can get the job done when he learns of his role in the Tontatta's plans. He was also happy to hear Cavendish praising Usopp for saving him from the life as a toy slave.

Sanji
When they first met in Baratie, Luffy took a great liking to Sanji not only for his superior cooking skills but also for his kindness by generously cooking a meal for the starvng Gin, which impressed Luffy to the point that he is determined to recruit Sanji as his cook. Luffy held Sanji's cooking in the highest regard especially meat based dishes, dropping anything he's doing for a meal despite Sanji's claim that he puts considerably less effort into Luffy's food than the meals he prepares for the women. Sanji will cook any animal that Luffy catches, but is also usually the one who has to "discipline" Luffy whenever food is stolen (usually by kicking his captain around whenever food is pinched). Despite this, Sanji put his life on the line for Luffy's sake when Bartholomew Kuma had them weakened. Sanji has rescued Luffy from drowning more than any other crew member and trusts Luffy to defeat the enemies Sanji himself has trouble against. Before Sanji became part of Luffy's crew, he stated that Luffy's dream was foolish, but acknowledges that his own dream is foolish as well. Though Sanji finds Luffy stupid at times, there is an underlying and often unspoken understanding that Sanji has great loyalty and respect for Luffy, his ideals and his dreams.

When the crew reunited, Luffy was pleased to see his cook again and they set off to Fishman Island. Sanji was jealous of captain being sent to Amazon Lily and his friendship with Boa Hancock. Nevertheless, they still get along and have confidence in each other's abilities. In addition to being willing to trade his life for Luffy's, he declared to Capone Bege his belief that Luffy would become Pirate King, and that he would never do anything that would endanger Luffy's dream. Upon meeting Charlotte Pudding (Sanji's betrothed), Luffy (along with Nami, Chopper and Brook) learned that Sanji had turned down Pudding in order to be able to return to the Straw Hats. Luffy and the others were all greatly shocked to hear that Sanji would turn down a woman - especially such a beautiful and (seemingly) kind one - in order to continue adventuring with them, which moves Luffy so much that he starts crying. Sanji has also demonstrated his respect for Luffy's position as the crew's captain. He backed Zoro in telling Luffy that Usopp had to apologize for disrespecting Luffy's decisions before being allowed back on the crew. Additionally, after a duel between them, Sanji tells Luffy that, by insulting and attacking his captain, he had forfeited his right to return to his captain's ship.

Luffy reciprocates Sanji's loyalty and respect by tasking Sanji to be the temporary captain of the Thousand Sunny while Luffy fought in Dressrosa; this task included not only protecting the ship and crew, but also battling a Yonko's crew and reaching Zou. This outstanding trust continued when Luffy landed in Zou to find Sanji absent, with Luffy (along with Zoro) trusting that the cook would "look after himself" despite Nami's protests. Luffy later attacked Charlotte Cracker for insulting Sanji's loyalty, by suggesting that Sanji looked down on the crew due to their inferior social status, and that he would choose a comfortable married life over returning to the crew. Even after Sanji instigated a duel between them, Luffy refused to back down, defend, or retaliate; afterwards, Luffy declared that he knew Sanji's insults about the crew were all lies. Completely unlike his fight with Usopp, Luffy refused to hurt his cook and stated that he would not move or eat anything other than Sanji's cooking until Sanji returned. He also claimed that he couldn't become the Pirate King without Sanji, causing Sanji to break down in tears.

As with Nami, Robin and partly Usopp, Luffy was quick to respond when it seemed that Sanji was on the verge of leaving the crew. While Luffy was initially happy to accept Sanji's intended bride as part of the crew, as long as Sanji himself returned, he quickly learned from Pekoms that the arranged marriage would entail Sanji joining the Big Mom Pirates. In response, Luffy yelled at the lion Mink, saying that he would never allow that to happen, and proceeded to lead the Sanji retrieval team into Big Mom's territory, risking conflict with both a Yonko and an infamous Underworld army in order to get Sanji back. Even while seriously wounded, Luffy stubbornly refused to move and had to be knocked out by a Big Mom Pirate and taken captive.

After getting captured and learning of Big Mom's true plan to assassinate Sanji, Luffy became enraged and tried to rip his own arms off in order to escape and warn Sanji. After being freed by Jinbe, Luffy's first thought was rescuing Sanji, despite his injuries and hunger, and he rushed through Big Mom's palace searching for him. After Reiju informed him that Sanji became aware of Pudding's plan, a relieved Luffy decided to return to the spot where he promised to wait for Sanji.

Just as he did with Nami and Chopper at Punk Hazard, Luffy understood when a decision was important to Sanji, and decided to support that decision. When Sanji stated that he could not leave Whole Cake Island with Luffy after learning of Big Mom's plot to assassinate his family, Luffy responded simply that was who Sanji was, and that he and the Straw Hats would help Sanji wreck Big Mom's plans.

When Luffy emerged from the Mirro World, Sanji fought through several of the Big Mom Pirates and carried his captain away. Sanji even suffered injuries to his own person but refused to let the vengeful enemy crew touch his captain.

After Sanji returned to the crew and they escaped Totto Land, Luffy was very happy to have him and was elated to hear him say he was going to cook. He even begged Sanji to keep the raid suit he received from Niji even though Sanji made it clear he wanted nothing from his family.

Tony Tony Chopper
Chopper, as the youngest of the crew, often joins him and Usopp in singing and fooling around, and he credits Luffy for helping him find the courage to go on adventures. Luffy accepted Chopper as a person and didn't treat him like a monster as so many others did and corrected Chopper when he said he didn't have any friends by shouting "You're wrong reindeer, I'm your friend!" this caused a great impact on Chopper causing him to love Luffy like a big brother. Chopper also often tends to jump after Luffy whenever his captain starts drowning, despite also being unable to swim due to having eaten a Devil Fruit as well. Luffy has deep faith in Chopper's medical skills, as when he explained that the "candy" that the giant children were eating was in fact a dangerous drug, Luffy broke a promise with one of them to bring some more "candy".

Chopper devoted himself to "becoming a real monster" during the timeskip, no longer afraid to be feared as long as he can be of help to Luffy.

Nico Robin
Luffy and Nico Robin first began as enemies, but after Robin saves his life in Alabasta, Luffy grows to trust her more deeply which he shows by allowing Robin to join his crew without any reluctance. Robin is especially grateful to him for taking her in despite the risks it involved, as well as for pursuing her all the way to Enies Lobby and directly opposing the World Government. At Water 7, Luffy reveals that he is very impressed by Robin's intelligence when he is talking about her with the mayor Iceburg. As such, Luffy always turns to Robin for explanation whenever they encounter an unfamiliar person, place, or thing. At first, she joined the crew because Luffy had saved her life when she wished to die, and had nowhere else to go, but eventually all of the crew members became important to her personally. Out of all the crew members, Robin is the most tolerant of Luffy's silly behavior, and actually finds him and his family ties amusing. Robin is also one of the few members of the crew who unquestioningly follows Luffy into any dangerous adventure he wants to embark on.

Franky


Luffy initially did not like Franky due to the latter's robbery of Usopp, despite Luffy and Usopp not being on the best of terms themselves at the time. This led to his distrust of Franky for a long while, before he eventually came around to the shipwright during the Enies Lobby Arc and Franky's eventually joining the Straw Hat Pirates. He is always amazed by Franky's building talent, and is often in awe of Franky's cyborg enhancements and modifications, a running gag among many males throughout the show. He also deeply respects him as a man after he was willing to show his genitals to everyone without shame and begging Robin not to rip them off, so he would still be a man when he joins the crew. After the timeskip, with Franky looking and acting even more robotic, he has only become even more amazed. This is especially true with Franky's mecha General Franky which Luffy holds in dumbfounded awe.

Upon hearing Ace's Mera Mera no Mi has resurfaced and was a grand prize in the Corrida Colosseum, Luffy offered Franky to eat it, showing a great deal of trust and friendship, though Franky refused due to not wanting to lose his ability to swim.

Brook


Luffy came to almost immediately befriend Brook upon their meeting, despite the rest of the Straw Hats distrusting and outright refusing Brook, whether due to the initial mysteries behind his form or simply his personality. Luffy's admiration and eventual trust for Brook was cemented in his offering Brook a place in his crew, Luffy's self-considered family.

As the musician of the crew, Brook is often requested by Luffy to perform a song. When requested to play by Momonosuke, he states that he will only respond to orders by his captain, before finally giving in and playing a song. Brook will often join Luffy, Usopp, and Chopper in immature antics, despite Brook being the oldest member of the crew at 90 years of age. Luffy had always stated that he wanted a musician in the crew, so Brook's job is very important to him. Brook often appears to enjoy Luffy's child-like antics and sometimes would even reinforce his humorous behaviour. Luffy is the only member of the crew to find Brook's skull jokes funny. This relationship is strengthened by the fact that Brook was part of the Rumbar Pirates, the crew that were such good friends with Laboon, and promised to meet up again.

Jinbe


While initially assisting Luffy only to protect and rescue Ace, the ex-Shichibukai Jinbe grew so fond of Luffy that he proclaimed while fighting Akainu at Marineford that he would gladly lay down his life to protect Luffy. After escaping the ordeal, he stayed with Luffy on Amazon Lily while he was recovering. It was Jinbe who also brought Luffy out of his self-pity and doubt. The fish-man made Luffy realize that even though Ace had died, he still had his own pirate crew. As Jinbe departed from the Kuja ship, he and Luffy expressed the desire to see each other again in two years. Luffy told Camie of this desire, only to be disappointed when he finds out that Jinbe had to leave Fish-Man Island. However, before he left, Jinbe did leave a message for Luffy with Prince Fukaboshi.

When they met after two years, Jinbe was happy to see him again but surprised he had not received his message. As he himself stated, he has the deepest gratitude for Luffy and his crew for stopping Arlong. He also wanted to apologize to them for Arlong, since he was the one who let Arlong go to the East Blue. Despite the mutual respect between them, after Luffy announced his desire to fight against Hody Jones to save his crew, he informed Jinbe that if he wanted to stop him, he would have to fight him. They eventually reached a compromise and formed a united front to combat Hody Jones and his crew. After the battle of Fish-Man Island, in which Luffy lost a large amount of blood, Jinbe offered his blood for the transfusion. Upon recovering, Luffy asked Jinbe to join his crew. While happy to have been asked, Jinbe declined the offer, stating he has other business to take care of first, but said when all that was done and they meet again, if Luffy and his crew still wanted him to join later, he promised he would join than. Luffy and all the crew members show they want him to join.

During the Whole Cake Island Arc, while Luffy and Nami were being held prisoner by Charlotte Opera, Jinbe came to their rescue by attacking the captor as Luffy was very excited to see his friend who stated his intention of freeing them. It is shown that Luffy trusts Jinbe's opinion, as he fully agreed to meet with Capone Bege (even after hearing the horrible actions Bege did in the past). Jinbe also broke up an argument between Luffy, Bege, and Caesar Clown by pointing out that they share a common enemy in Big Mom.

In the midst of the chaos at Big Mom's Tea Party, Luffy was delighted when Jinbe confronted Big Mom and officially declared his intention to leave the Big Mom Pirates in order to join the Straw Hats.

When his former crew was in danger, Jinbe told the Straw Hats that he had to defend them. Before he disembarked, Luffy made him promise not to die so he would join the rest of the crew at Wano. Jinbe agreed to his new captain's terms and promised to return to their side as he joined his former crew in battle. When receiving a newspaper from Carrot, Luffy was worried about Jinbe's status after they escaped Big Mom's territory but no details were made.

Straw Hat Grand Fleet


The Straw Hat Grand Fleet was formed at the end of Dressrosa Arc, comprised of seven groups, the Beautiful Pirates, the Barto Club, the Happo Navy, the Ideo Pirates (originally known as the XXX Gym Martial Arts Alliance), the Tonta Corps, the reborn Giant Warrior Pirates, and the Yonta Maria Grand Fleet. Though Luffy turned down their offer for the formation of the fleet, the leaders still pledged themselves to be his underlings without Luffy having the obligation to respond. Though a bit annoyed at this, Luffy still accepts them as his friends, promising to help them out if they need it.

After Luffy's actions in Tottoland were revealed, the fleet announced they joined the Straw Hats with Luffy being marked as the "fifth Yonko" as a result.

Cavendish
The captain of the Beautiful Pirates, Cavendish, harbors a deep-seated resentment of the Worst Generation, which used to include Luffy, for stealing the spotlight from him. At first, Cavendish was friendly and sociable to him since Luffy was under the guise of "Lucy". However, right after learning his true identity, Cavendish immediately turned hostile and became hell bent on killing Luffy with his own hands.

Luffy was annoyed by Cavendish's attempts to kill him and with help from Rebecca was able to get away from him. He gained a better view of Cavendish when he watched the latter defend Rebecca from the crowd's jeers, though he admitted to still not liking him.

The hostile nature between them ended when Usopp helped in Cavendish's transformation back from a toy to his human form, even to the point where he told Luffy that he would take down Doflamingo to repay the debt. Cavendish transported Luffy on his horse Farul to confront the Shichibukai and ultimately gave Luffy permission to take the latter down after his steed was injured and he wanted to avenge it.

Luffy seems to have grown to respect Cavendish to a degree as while facing Doflamingo, he watched Cavendish protect some of his crewmates from the Shichibukai and stated he was trusting him to defend his friends. Cavendish agreed though he misinterpreted this as Luffy being his "fan". Later on, it was shown that Cavendish has gained respect for Luffy as well as he was one of the captains who swore to serve under Luffy as they departed Dressrosa.

Luffy often mispronounces Cavendish's name and refers to him as "Cabbage".

Bartolomeo
Two years ago, in Loguetown, Bartolomeo witnessed Luffy survive execution at the hands of Buggy. From that moment forward, he followed all of the Straw Hats' adventures, growing more and more delighted at the crew's escapades. Bartolomeo feels great admiration for Luffy and his crew, referring to them as "Senpai". He formed the Barto Club, with all of the crew members share his admiration. It is shown he will do anything to the point of cutting off a man's tongue for badmouthing Luffy and it's revealed Bartolomeo's reason for wanting the Mera Mera no Mi was to give it to Luffy as memento of his late brother Ace. He was also willing to fight Sabo (not knowing he was Luffy's brother) for saying he wouldn't allow Luffy to have the Devil Fruit. Unlike the other fighters who pursued the bounties of Doflamingo's enemies during the "Birdcage", Bartolomeo did not betray the Straw Hats and continued to offer them aid throughout the conflict, even willing to sacrifice his own life for them. After the conflict on Dressrosa was finished, Bartolomeo along with the other captains swore to serve under the Straw Hats.

Bartolomeo and his crew even gave the Straw Hats a ride to Zou before parting ways. Luffy personally thanked Bartolomeo for his help, marking the first time he call the latter by his name, something that caused the latter to tear up.

Sai
Sai is the thirteenth leader of the Happo Navy. Luffy first encountered him when he was accused of getting in a fight with Spartan at the Corrida Colosseum. Sai, who witnessed the act stood up for Luffy by declaring it was Spartan who started the fight and he should be the one to be disqualified. When Luffy thanked Sai the latter reacted belligerent and angry and even had to be restrained by his brother. Sai did not seem to hold a grudge toward Luffy for winning the Block C and even tried to get his attention for his grandfather to thank him for restoring his head. During the "Birdcage", Sai and his family allied themselves with Luffy to defeat Doflamingo rather than go after the bounty on his head. After the conflict on Dressrosa was finished, Sai and the other captains swore to serve under the Straw Hats. Though he is grateful, he was one of those who got annoyed when Luffy first turned down the alliance and thought to incapacitate the 'commander' and force him to accept them.

Ideo
Ideo first met Luffy as 'Lucy', his opponent in the Corrida Colosseum. However, after losing and being turned into a toy, and then promptly saved from that life, he ended up allying himself with the Straw Hats. Though Luffy has had little interaction with Ideo, the Longarm boxer is still grateful to have been saved and swore himself to be Luffy's underling as the representative of the XXX Gym Martial Arts Alliance. Despite this, he was one of those who got annoyed when Luffy first turned down the alliance and thought to incapacitate the 'commander' and force the Straw Hat to accept them.

Leo
Not much conversation is seen between the two of them, but due to being friends with Usopp, he quickly trusted Leo and the Tontattas. Leo was completely indebted to Luffy and the Straw Hats for ending Doflamingo's reign over Dressrosa. As a result, Leo asked permission from Gancho, the king of Tontatta Kingdom, to travel with him and become a representative for the Straw Hats. Even though Luffy declined the offer, Leo chose to pledge allegiance anyway. After celebrating a feast with the Straw Hats and their allies, Leo returned to Dressrosa with his fellow Tontattas and asked the people to build a statue of Luffy and Usopp in their honor, showing much admiration for them.

Hajrudin
Though Luffy defeated Hajrudin during the Block C battle for hurting the Fighting Bull, the giant was willing to overlook this incident during the "Birdcage" game as he wished to repay his debts to Usopp for saving him from his toy transformation. After the conflict on Dressrosa was finished, Hajrudin was one of few captains who swore to serve under the Straw Hats, despite the low number of crewmates of his reviving Giant Warrior Pirates.

Orlumbus
The leader of the Yonta Maria Grand Fleet. During the events of the "Birdcage" game, Orlumbus allied with Luffy and the rest of their allies in order to end Doflamingo's reign over Dressrosa. After Doflamingo was defeated, Orlumbus decided to pledge his allegiance to the Straw Hats, along with the rest of their allies. When Luffy declined the offer, he decided to pledge anyways and help him out whenever he needed it.

Trafalgar D. Water Law


Luffy has developed a positive relationship with Trafalgar Law and his crew, as they braved the Battle of Marineford and the attacks of the Marine admirals just to save him. When Luffy met Law again on Punk Hazard, Luffy was happy to see him again, not knowing Law's intentions. Luffy stated that he and Law will be enemies if he's going after the One Piece too, but he is grateful nonetheless. Luffy was visibly surprised when Robin revealed that Law became one of the Shichibukai during the timeskip. When Law helped save Nami, he proposed an alliance with Luffy to take down one of the Yonko. Luffy quickly accepted Law's offer after being told that they would be taking down Kaido. He appears to trust Law to go along with this plan of action. When Law was shot by Doflamingo, Luffy showed a lot of concern for his ally. After that, when Law was kidnapped by the Shichibukai, Luffy stated his desire to rescue him. Due to Law being his life saviour, Luffy has great gratitude towards Law, considering Law to be his friend. Since the two have formed an alliance, Luffy has developed a running gag of making decisions on behalf of the alliance without considering Law's opinion, usually to the latter's annoyance. He decided to send Caesar Clown flying away in Punk Hazard when the agreed upon plan was capturing him, defeating Doflamingo outright when the plan was leaving him for Kaido, and most recently, joining forces with the Mink Tribe and Kozuki Family to face against the Beasts Pirates. They even had a comical argument about this in Dressrosa, as Law decided to terminate the alliance in light of their plan being compromised. Luffy said that Law can't decide these kinds of things for the both of them, and Law retorted that was precisely what Luffy was doing. Luffy was shocked and later utterly outraged when he thought Law was killed by Doflamingo.

During Law's desperate struggle against Doflamingo, it was shown that Law thinks highly of Luffy and his crew, saying that they are capable of performing miracles. Law later stated that if Luffy was to be defeated by Doflamingo, he would allow himself to be killed as well, believing that he was responsible for the battle between Luffy and Doflamingo. However, Robin pointed out that Luffy would not enter a battle with no personal reason.

During the Wano Country Arc, the one thing that deeply concerns Law is Luffy's tendency to get into trouble and he even berated Luffy for complicating Kin'emon's plan due to his desire to do good.

It also seems like Luffy cannot pronounce "Trafalgar" properly and calls him "Tora-man" (トラ男) instead, a portmanteau of the "Tra" in "Trafalgar" and the Japanese kanji for "male". It is often localized as "Tra-guy" in some subs or as "Traffy" in Pirate Warriors 3.

Kozuki Family
Luffy met the Kozuki Family when he and the crew were on Punk Hazard after receiving a distress signal. After rescuing Kin'emon and Momonosuke, guardian and master posing as father and son, from the island and Caesar Clown, Luffy allowed them to travel with him and his crew to search for their other comrades. After the battle with Doflamingo ended in victory and the rescue Kanjuro, they continued to travel to Zou. Once on Zou and learning about Momonosuke's true heritage, he doesn't care in the slightest. After meeting Raizo, he wanted to see him do tricks and became amazed when he did them. After learning about what Kaido has done to their country, Luffy was willing to form an alliance with them in order to defeat Kaido, along with the Mink Tribe and the Heart Pirates. Luffy and Momonosuke seem to get into small fights like two brothers. This seems to parallel how Luffy and Ace used to fight and argue when they were kids.

Mink Tribe
The minks are grateful to Luffy and the the Straw Hats, not only because Sanji's group saved them after being devastated by Jack's attack on Zou, but also because Luffy's victory over Doflamingo and the latter's following arrest was what caused Jack to abandon his campaign and leave the island. After seeing how the Mink Tribe risked their lives and protected the samurais from Jack, he became amazed. Luffy then formed an alliance with them in order to defeat Kaido, along with the Kozuki Family and the Heart Pirates.

Laboon
After entering the Grand Line, Laboon was the first thing the Straw Hat Pirates saw. Launching the cannon in the hopes that it would slow them down, Luffy, instead, hit Laboon. After saving him from Mr. 9 and Miss Wednesday who were trying to use Laboon for food, Crocus explained to Luffy why Laboon would slam his head into the Red Line. Luffy, in an effort to give Laboon a renewed sense of hope, picked a fight with the whale by jamming the Going Merry's mast into the whale's head. After the battle (which Luffy called a draw), Luffy promised Laboon that he would return to see him, under the guise of wanting a rematch, moving Laboon to tears of joy. As a sign of the promise of the future rematch, Luffy paints the Straw Hat Jolly Roger on Laboon's head, commenting that the insignia would be washed away if Laboon hit Reverse Mountain further. This prevents him from slamming against the mountain anymore.

Skypiea
Defeating Enel, the self proclaimed "God" of Skypiea and freeing its people, as well as granting the Shandia back their homeland, ringing the golden bell, and saving Angel Island, Luffy and the rest of the Straw Hat Pirates have become heroes to the people. They even offered the broken column to their saviors. With peace restored to the land many hope that the Straw Hats will visit again. Many were also disappointed that they never got to say goodbye and rang the golden bell instead. Aisa seems to hero worship Luffy as a role model, and Gan Fall also compares Luffy to the Pirate King Gol D. Roger.

Amazon Lily
Luffy also has a very friendly relationship with the entire population of Amazon Lily despite their initial hostility towards him. But after Luffy gained Boa Hancock's friendship and love, it seems every single Kuja practically worships him, as they had never seen a man before. They even went as far as selling "touches, pokes and stretching" of Luffy and his rubbery skin for 20 gold pieces each and most of them affectionately refer to him as "Luffy-sama".

Fish-Man Island
Some time after their arrival, the Straw Hat Pirates became criminals of Fish-Man Island except for a few friends due to suspicion of kidnapping mermaids, Madam Shyarly's prophecy of Luffy destroying Fish-Man Island, and then Luffy's crew taking over Ryugu Palace when the Neptune army attacked them. However, things changed after Hody Jones launched his coup d'état and was on the verge of executing Neptune. Rather than watching their King die, the civilians were willing to see Shyarly's prediction come true. During the ordeal, the Straw Hats were able to gain the civilians' trust after Luffy thwarted Neptune's execution per Shirahoshi's pleas and when the crew was seen fighting alongside Jinbe. After saving Fish-Man Island from the New Fish-Man Pirates, Vander Decken IX, and Noah, Luffy and his crew were cleared of the kidnapping charges when the mermaids were found and the Straw Hats were hailed as heroes for their efforts in saving the island from destruction. However, when Luffy was suffering from critical blood loss, the civilians did not do anything to help him due to their laws, but they rejoiced when Jinbe volunteered to be the blood donor. After a huge party in the Straw Hats' favor, Luffy discovered that while Fish-Man Island was protected by the Big Mom Pirates, she would not hesitate to destroy Fish-Man Island if she did not receive her monthly 10 tons of candy. Luffy then took responsibility for the missing candy to protect Fish-Man Island again. When negotiations of treasure instead of candy failed, Luffy declared that he would defeat her in the New World and claim Fish-Man Island as his territory.

Kyros
Luffy first met Kyros while the latter was a toy soldier and Luffy was amazed at seeing a living toy.

During their next meeting at the Dressrosa Palace, Kyros noted that Luffy was a pirate but due to them both desiring to take down Doflamingo, Kyros immediately warmed up to Luffy and allied with him to save the kingdom. Furthermore, Kyros trusted Luffy as he mentioned he himself is also an outlaw. Kyros refers to Luffy as "Luffyland" and aided him in the quest to defeat Doflamingo. When Luffy defeated Doflamingo, Kyros thanked the Straw Hats for saving Dressrosa and gave them shelter before the Marines tried to capture them.

In turn, Luffy brought the latter's daughter back to him, so they could live together.

Gatz


Because Luffy (as Lucy) was gaining such attention in the Corrida Colosseum with his amazing feats, the commentator Gatz became a huge fan of Luffy rooting for him to win the competition. During the fight against Doflamingo, Gatz came to Luffy's side when his Gear Fourth wore off and protected him from Doflamingo's rampage long enough with various gladiators to give Luffy enough time to regain his Haki. Furthermore, he has a immense faith in Luffy to the point he made a broadcast to the whole island that Luffy would defeat Doflamingo with one punch and save the kingdom. After Doflamingo's defeat Gatz tearfully proclaims Luffy to be the victor of both the fight and the savior of Dressrosa. When he learns that Luffy supposedly kidnapped Rebecca, he was left in shock but still remained a fan of his. But it was clear that he was aware that Kyros is Rebecca's father and was happy that Luffy brought her back to him. Even after finding out his real name, Gatz, along with the citizens of Dressrosa, still calls him by his gladiator name "Lucy".

Tama
Luffy inadvertently rescued Tama when her kidnappers attacked him. Because of this, she has immense gratitude and refers to Luffy with a "big brother" honorific. She even went as far as to give him the rice she was meant to have, even though it is the most she eats all year. However, Tama became furious when Luffy reported Ace's death to her. After she was abducted by Gazelleman and brought to Holdem, Tama hoped for Luffy to save her, showing her faith in him. After Luffy freed her from Holdem, Luffy promised that he would make her life better before leaving Wano Country. She is unaware that Luffy is Ace's brother though she has noticed similarities between the two. After hearing that Kaido attacked her, Luffy regretted not taking her to her home safely himself and attacked Kaido in a fit of rage. When Tama heard about Luffy's capture, she was more concerned about him than her own injuries.

Nefertari Vivi
Luffy is good friends with Nefertari Vivi, who was with them all throughout the Alabasta Arc, and he even considers her an honorary Straw Hat crew member. Whenever she sees Luffy doing something that might compromise the crew's safety, even when he means to help, she reminds him of a leader's responsibilities, and she holds Luffy in great respect for helping save Alabasta. She was not shocked that Luffy took Nico Robin into his crew despite her being Vivi's enemy in the past (showing trust in his judgment), and she did not show any prejudice about Luffy being the son of the world's worst criminal.

Wapol
Wapol first met the Straw Hats on their way to Drum Island and antagonized them by eating a bit of their ship. When Luffy met Wapol again on Drum Island, Luffy sent Wapol flying, keeping him out of Drum Island for good.

Enel
On Skypiea, Luffy and his crew made enemies out of Enel and his priests for breaking their laws. During the survival game, Luffy was angered at Enel for hurting his friends and swore to defeat him. Being made of rubber, Luffy proved to be completely immune to Enel's electrical powers, which made him a natural enemy. Eventually, Luffy defeated him and put an end to his evil plans for good.

Shirahoshi
Luffy formed a friendly relationship with princess Shirahoshi after saving her from an axe thrown by Vander Decken IX and after she learned that he saved her beloved pet shark, Megalo. Once Luffy learned that Shirahoshi had been locked in Hard-Shell Tower for ten years to keep her safe from Decken, he stated that it must have been really boring for her. Luffy then offers to take a walk with her outside the castle with him serving as her bodyguard so she could see the world outside her tower while protecting her from Vander Decken IX. Even though Luffy and Shirahoshi do get along, Luffy gets annoyed at her tendency to cry. After seeing how fragile Shirahoshi's personality is, Luffy bluntly called her a crybaby and a weakling. This seems to parallel how Ace and Luffy's relationship were as children. Shirahoshi, however, does not show any resentment towards Luffy for calling her names. After seeing how Shirahoshi was able to honor her mother's final wish for so many years, Luffy acknowledges that she is not as weak as he originally thought. He then calls her "Weakhoshi" since he still considers her a crybaby. After the island was saved and Luffy was about to leave, he promised to take her to the surface to see a real forest the next time they met. Due to the promise, she initially refused to attend the Levely with her family, showing a strong devotion and friendship with Luffy. However, after news of Luffy's exploits at Totto Land spread throughout the world, Shirahoshi decided to join her family, not wanting Luffy to call her weak again. Luffy is unaware of Shirahoshi's true identity of Poseidon, despite the latter using her power unconsciously to help him directly.

Rebecca
Luffy has been on good terms with Rebecca after she shared the story of Kyros with him when he took an interest in his statue. Rebecca was thankful for Luffy defeating Spartan and was impressed with his performance during the Block C battle royale. Even though she tried to kill Luffy to better her chances of getting the Mera Mera no Mi in order to protect the one she cares about, Luffy did not hold a grudge against her and was still thankful for her buying him food. Afterwards, Rebecca opened up to him. In turn, Luffy considers her a nice person and was angry at the audience for throwing horrific insults at her due to her lineage. When Doflamingo unleashed the "Birdcage" to conceal Dressrosa, she became a target to his game, which caused Luffy to worry about her. Luffy promised Rebecca that he would repay her by defeating Doflamingo and when she asked Luffy if he can defeat Doflamingo, he proclaims he can since he's going to become King of the Pirates. After defeating Doflamingo, she cried in tears when Luffy won and was by his side when he became unconscious after the battle. Even after finding out his real name, Rebecca still calls him by his gladiator name "Lucy". Luffy cares for Rebecca and understood her feelings, he was not happy with Kyros's decision to stay away from her, so Luffy ran to the palace in spite of being chased by the Marines asking her if she is ok with her father's decision. After Rebecca replied she is not, Luffy took her close to where Kyros is. This seems to parallel how Luffy felt when he was a boy where he and Ace were forced to stay away from Sabo and couldn't bring him back due to their social class. As Rebecca sees Luffy and the others leaving, Rebecca hopes that one day she'll see him again.

Vinsmoke Reiju
Luffy first met Vinsmoke Reiju, Sanji's elder sister, when the Sanji Retrieval Team encountered Germa 66 just after entering Big Mom's territory. During that first meeting, Luffy was slowly dying from the effects of consuming the Armored Stonefish's poisonous skin and Reiju chose to save Luffy's life, sucking the poison out of his body as her thanks for everything the Straw Hats had done for Sanji. They later met again inside Whole Cake Chateau, after Reiju helped hide Luffy from Big Mom's guards. She informed Luffy that Sanji already knew of Pudding's plan to kill him during the Tea Party/wedding ceremony, leading a relieved Luffy to thank Reiju before exiting the chateau.

During their brief encounters, Reiju has been shown silently admiring Luffy's loyalty to her younger brother. After she saved his life, Luffy thanked Reiju but immediately demanded that she return Sanji, causing her to smile. She also smiled after seeing Luffy and Nami on Whole Cake Island, having successfully made it that far in order to rescue Sanji, and was visibly saddened after witnessing Sanji being forced to attack Luffy in order to keep Luffy from following them. She also offered Luffy food after hearing his stomach grumbling, and smiled when he turned her offer down because of his promise to only ever eat Sanji's food again.

In a private conversation between herself and Sanji, she urged Sanji to flee Whole Cake Island with them, warning him that he would never again meet such friends in his life. After Sanji reunited with Luffy, he told Luffy of his desire to save the rest of his family. Luffy agreed to help, citing in part the fact that Reiju had previously saved his life.

Thanks to Luffy's efforts in showing Big Mom Carmel's shattered portrait and causing her to scream, Sanji was able to free Reiju and the other Vinsmokes after the Big Mom Pirates who immobilized and surrounded helding them at gunpoint. When Big Mom attempted to kill Reiju, Luffy and Sanji quickly came to her aid by blocking Big Mom's attack.

At Cacao Island, Reiju and her siblings aided Luffy once again by ensuring Sanji escape with him.

Bentham


Luffy became good friends with Bentham after he apologized for causing them trouble in Alabasta, and distracted the Marines so the Straw Hats could escape. Bon Kurei went as far as to give his life away to save Luffy and other Impel Down prisoners by posing as Magellan and ordering the opening of the Gates of Justice during the Impel Down Arc. While he was later determined to be alive, Luffy is unaware of his friend's condition.

Emporio Ivankov
Luffy has on numerous occasions been aided or befriended by members of the Revolutionary Army due to being Dragon's son. In Impel Down, he befriended Emporio Ivankov and Inazuma. Before directly encountering him, however, Ivankov and all of his Okama followers were already aware of Luffy's status as not only a pirate but Impel Down's first-ever intruder through the surveillance systems within the Great Prison, and he unintentionally achieved a celebrity status within NewKama Land as a result. Ivankov helped save Luffy's life with his healing hormones because he was moved by Luffy's selflessness, as Luffy begged that Bentham be saved even while being on the verge of death himself. Once they learned of his connection with Dragon, Ivankov determined himself to ally himself with Luffy, and protect the young pirate's life as best he could. Ivankov and Inazuma both aided Luffy in the breakout of Impel Down and assisted him in rescuing Ace at the Battle of Marineford. Upon the war's end, they snuck aboard the Marine ship that Boa Hancock took over. Ivankov then left Luffy in Jinbe's hands and then left with his Newkama followers to return to Momoiro Island as well as saying that he would like to meet Luffy again.

During the Dressrosa Arc, when Jean Ango mentioned his intention of capturing all the escaped Impel Down prisoners, Luffy wondered how Ivankov was doing.

Alvida
Alvida was the first enemy Luffy encountered on his journey. Luffy freed her ship caretaker, Koby, and became the first man to ever hit her. The two met again in Loguetown, after Alvida underwent a drastic change in appearance and surprised Luffy as she voiced admiration and has "fallen" for him because of his actions.

Kuro
Luffy had a dislike towards Kuro for planning to destroy Syrup Village. In return, Kuro did not consider him or his crew as a threat, seeing them as mere children instead of genuine pirates. Even after Kuro saw his own crew defeated, he believed that it was only due to their own weakness until Luffy revealed his Devil Fruit powers. Kuro’s beliefs for the life of a pirate angered Luffy, who had a completely different opinion about this matter. Luffy even stated that Kuro did not have what it takes to be a pirate and became utterly furious when Kuro attacked his own crew without showing any remorse. Kuro's contrasting beliefs and underestimation of Luffy's capabilities are what led to his ultimate downfall.

Krieg
Luffy and Krieg became enemies when the latter showed his desire to take over the Baratie as well as his ambition to become the Pirate King. Krieg was blinded by his arrogance and Luffy's seemingly harmless looks. After witnessing his Devil Fruit powers, Krieg came to believe that Luffy will just be another pirate in the Grand Line, as the place is filled with Devil Fruit users like him. In return, Luffy became infuriated when Krieg attacked Sanji, despite the latter offering food to him and his crew, and ordered Gin to throw away his gas mask and breathe the deadly MH5 poison gas after refusing to kill Sanji. During the fight, Krieg knew about Devil Fruit users' weakness towards sea water and tried to take full advantage of Luffy's weakness of the ocean. Even after being defeated, Krieg unconsciously got up and demanded to continue the battle only to be knocked out by Gin.

Arlong
Luffy developed a strong hatred towards the fish-man for his cruel treatment towards Nami and her village. In return, Arlong considered Luffy a weakling, given the former's ideal view on humans being inferior to fish-men. During their battle, Arlong believed that Luffy did not have what it takes to beat him. Luffy agreed that he does not have the talents like his other crew members, but was confident he would beat him. As the fight went on, Arlong went into a berserk state and recklessly attacked him. Luffy's rage towards the fish-man reached its peak when they were in Nami's room in Arlong Park after learning that this was the place where Arlong forced Nami to draw maps for his crew. Luffy resorted to destroying the room and the maps, which deeply enraged Arlong further. After breaking Arlong's nose, Luffy declared his intention to destroy the room and Arlong Park, but Arlong retorted that Arlong Park would not fall to a mere human. This proved to be his downfall as Luffy's attack not only destroyed the building but also defeated Arlong, ending his tyrannical rule.

Bellamy
Luffy met Bellamy back on Jaya and, after the latter mocked Luffy for chasing his dreams and believing in things like One Piece and Sky Island, Luffy chose not to fight back and let Bellamy and his crew beat on him, mirroring what Shanks did with Higuma. However, after Bellamy assaulted Cricket and stole his treasures, Luffy returned to fight him. As Bellamy continued to ridicule him on his dreams, Luffy returned the favor from earlier and brutally pounded Bellamy in the ground with one punch.

Two years later, Luffy was shocked to see him again and surprised that Bellamy no longer holds any ill towards him and will not laugh at him. During his fight in Block B Luffy even cheered for him and they later had a friendly talk. Bellamy was even reluctant to assassinate Luffy per Doflamingo's orders. During the "Birdcage" game, Luffy declared Bellamy a friend after seeing him so horribly beaten by Doflamingo after all the admiration the latter had for him. After Doflamingo released Bellamy from his control, Bellamy refused to betray his own principles and asked Luffy to fight him one last time. Though Luffy tried to talk him out of it, he reluctantly punched Bellamy in the ground in a similar manner at Jaya. With his last thoughts, Bellamy thanked Luffy for calling him a friend. After Doflamingo was defeated, Bellamy parted ways with the Straw Hats and while stating he will not be Luffy's subordinate like those who join the Straw Hat Grand Fleet, he would keep a piece of the Vivre Card just in case he got into trouble.

Foxy
When Foxy first met the Straw Hats, he appeared to look down on them for their naivety and ignorance, despite their crew holding bounties far above his own. His overconfidence from being undefeated in Davy Back Fights led to him underestimating Luffy and believing his cheating ways would be enough to secure victories, even against a 100,000,000 bounty. After losing the Davy Back Fight to Luffy, Foxy vowed to get the Straw Hats back for his loss.

Silvers Rayleigh


Ever since Rayleigh had heard about Luffy from Shanks he had wanted to meet him face to face. When Luffy found him on the Sabaody Archipelago, he was really excited about hearing stories about Gol D. Roger. The more they talked, the more amused Rayleigh felt as he compared Luffy's demeanor to his old captain. He, like Shanks, has very great expectations for him. After the war had ended, he swam across the Calm Belt to reach Amazon Lily where Luffy had been recuperating from his injuries and from losing Ace. From there, he helped Luffy break into Marine Headquarters again with Jinbe in order for him to send the secret message to his crew. Rayleigh also mentored Luffy on how to master all three different forms of Haki that he possessed. After the 2 year timeskip, it is apparent that both of them became close from their training together as before heading to his ship, Luffy yelled towards Rayleigh with a big smile "I'm gonna do it, I'M GOING TO BE PIRATE KING!", with Rayleigh donning a smile with tears in his eyes. Rayleigh himself later proudly proclaimed Luffy as his pupil to the Marines and kept them busy to prevent them from interfering in Luffy's departure. While Luffy set sail Rayleigh seemed to be comparing his late captain Roger and Luffy, claiming that destiny is slowly but surely taking shape and that Luffy has become a man well fit to wear the Straw Hat, which originally belonged to Roger. He also said that it might be worth living a little longer. Luffy strongly respected Rayleigh as a mentor. During his time training on Rusukaina, Luffy was willing to even endure hunger as punishment, as he refused food from the wild animals, an act which contradicts his gluttony.

Hody Jones
After the Straw Hats arrived at Fish-Man Island, they became enemies of Hody Jones and the New Fish-Man Pirates for crushing Arlong's ambitions. During their confrontation, Luffy has gained a deep hatred towards Hody for his treatment towards his subordinates and the people of Fish-Man Island and for trying to destroy everyone. To that end, Luffy defeated him and stopped his takeover. Even after his defeat, Hody demanded a rematch with Luffy despite corroding his body beyond repair.

Chadros Higelyges
Initially enemies due to Luffy and his crew opposing his "master", Chadros Higelyges did not trust them and resented them for capturing him. However, Luffy seemed to respect Brownbeard's admiration for Caesar. When Luffy discovered that Caesar betrayed Brownbeard, his hatred for the scientist grew and he resolved to save Brownbeard from being killed by his own followers under Caesar's command. When the conflict was resolved, Luffy thought it was a shame when Brownbeard decided to turn himself in, even calling the former pirate his friend.

Chinjao
Because Monkey D. Garp crushed his pointy head and robbed him of the means to acquire a certain treasure, Chinjao developed a hatred not only against Garp but also those in his bloodline. At the Corrida Colosseum, Chinjao originally tried to take his grudge out on Luffy. Ironically, when Luffy defeated him, he inadvertently returned what Garp took away by restoring his pointy head, gaining his gratitude. Afterwards, Chinjao's grudge against Luffy and his family was lifted and he later joined forces with Luffy to defeat the Donquixote Pirates.

Caribou
Caribou originally intended to join Luffy's crew to kill him. After seeing Luffy, Zoro, and Sanji defeat the Kraken with ease, Caribou started to fear Luffy's strength and the Straw Hat Pirate's power in general and offered to become their underling or slave. Luffy, on the other hand, viewed him as an annoyance, barely interacted with him and quickly forgot about him.

After Luffy found him trying to capture Shirahoshi, Luffy indifferently sent Caribou flying out of the palace with a single strike, showing that he did not view Caribou as an actual threat.

Later, Luffy and Caribou met again in the Beast Pirates' prison in the Udon region of Wano Country. Caribou begged Luffy for food and offered to team up with or to become Luffy's slave again to break out of the prison. Luffy did not seem to have any hard feelings about Caribou but he was annoyed by his begging. Luffy was notably able to remember Caribou's name, in spite of the little interaction they had.

After Raizo freed him and they spoke with Luffy, Caribou once more pleaded with him to let him join him. This time, Luffy agreed and Caribou was shocked but hastily accepted Luffy' mercy though stated that he is even more scared of him.

Eustass Kid
When they met at Sabaody Archipelago, Eustass Kid was amused by Luffy actually punching a World Noble and they fought by each other's side against the Marines.

Luffy's personality has left an imprint on Kid, being left with respect for him after he claimed that he would be the one to find One Piece and become Pirate King. They departed on good terms and agreed to meet up again in the New World. After they met again in a prison at Wano Country, they became competitive with each other and would argue on who did more work.

Jewelry Bonney
Though Bonney and Luffy have yet to actually meet face-to-face, Luffy's actions during the Celestial Dragon incident have unintentionally garnered him Bonney's fury, a fury that even extended to the rest of the Straw Hats. Upon hearing of Luffy's attack on a Celestial Dragon, Bonney was angered and swore to crush the Straw Hats in the New World. However, after the timeskip, when learning of Doflamingo's defeat, Bonney was happy for Luffy's victory and stated that she was proud to be in the same generation with Luffy.

Capone Bege
After Luffy punched a World Noble, Capone Bege was angered at him for causing trouble at Sabaody Archipelago. He later antagonized Luffy's crew by capturing his cook, Sanji, and forcing him to attend the wedding with Big Mom's 35th daughter, Charlotte Pudding. Later when Jinbe talked about Bege's past, Luffy was appalled by his cruelty, and was further angered towards him after learning that he abducted and attempted to kill Pekoms. However, Luffy agreed to meet with his fellow Supernova to discuss terms for a possible alliance in order to take down Big Mom. At the negotiations, the two had a heated argument with Luffy wanting to attack Bege for hurting Pekoms but they were forced to put aside their differences after Jinbe pointed out that they share a common enemy in Big Mom. After listening to the assassination plot, Luffy agreed to being the bait in Bege's plan due to finding it interesting.

During the Tea Party, Bege was amused by Luffy's chaotic actions which left Big Mom in a fury but was shocked that he would announce his presence to her. Despite their multiple grievances with one another, and even in light of their assassination plan failing, the two still treat each other as allies. Bege refused to turn on Luffy despite receiving orders to do so and later provides safe place for the Straw Hats inside of his Big Father form. Luffy in turn showed great concern for Bege as he endured Big Mom's onslaught, choosing to help back him up against Big Mom and defying orders not to engage the enemy.

After successfully escaping the Whole Cake Chateau, Luffy and Bege parted on good terms. After risking his life to lure Big Mom away from the Straw Hats with the wedding cake, Bege commented that he would not forgive Luffy and his crew if they die.

Underworld
When Luffy fought Caesar Clown, the scientist warned him that he was protected by many powerful people in the blackmarket Underworld and defeating him would incite their fury. This did not bother Luffy as he had already been fighting people like that since coming to the Grand Line and took the mad scientist down. All the brokers watching reacted with shock and anger, with one saying the underworld could not stay quiet about this. Upon defeating Doflamingo, the most influential man in the underworld, many buyers became angry with Luffy over the deals he cost them, one even stabbing his wanted poster. A large group of these dealers even formed an alliance to kill Luffy and get revenge, only to be destroyed by Issho as a gift for Luffy.

Caesar Clown
Luffy and his crew become Caesar Clown's enemies after they stumbled on Punk Hazard. To ensure that word of his felonies does not become public, he ordered his underlings to eliminate the Straw Hat Pirates. Once the crew learns of the sinister experiments that Caesar has been conducting, they aim to capture him. Luffy did originally think of him as a nice person from what Brownbeard stated, however, after hearing from Momonosuke about his cruel treatment towards his men and how he does not care about what happened to the children, Luffy became enraged and more determined to defeat him. Caesar warned him that if he defeats him, Doflamingo and one of the Yonko will come after him by touching him, though Luffy retorts with an angry punch stating he has been taking on guys like that since he entered the Grand Line.

On Zou, Luffy completely forgot about Caesar and was only reminded of his actions when it was said that Jack used one of Caesar's gas weapons to poison the Mink Tribe. At Whole Cake Island, he spotted Caesar among Bege's crew and was angry to see his face again as the latter tried to deny his identity. However, after it was pointed out that it was really him, the two got into an argument with Caesar blaming Luffy for all the pain and suffering he has been put through. They nearly came to blows only to stop when Jinbe pointed out that they share a common enemy in Big Mom and were forced to briefly put aside their differences.

After escaping the Whole Cake Chateau, Caesar immediately left Luffy's group behind after he was given his heart back, happy to finally get away from them.

World Government
Naturally as a pirate, Luffy is an enemy of the World Government. He wasn't important to them at first, but they started taking him seriously after he defeated the most notorious pirates of the East Blue, and even more so after defeating Crocodile at Alabasta, declaring war on them by burning their flag and defeating Rob Lucci of the CP9 at Enies Lobby, defeating Gecko Moria at Thriller Bark, striking a World Noble and escaping the Sabaody Archipelago. They now see him as a potential threat to the whole world when he is revealed to be the son of the Revolutionary Dragon, and that he survived the Battle of Marineford.

Five Elders
Despite never encountering them, Luffy has made enemies out of the Five Elders as they consider Luffy both a troublemaker and potential threat to the government after his victory over Crocodile and later on invading Enies Lobby, punching a World Noble, breaking into Impel Down, and intruding in the Battle of Marineford. Because of Luffy's actions against the World Government, the Five Elders view Luffy as a dangerous threat to the balance of the Three Great Powers, especially after learning of his heritage as the son of their archenemy Dragon. After Doflamingo's defeat, the Five Elders are extremely shocked and angry that Luffy was behind yet another major incident, causing the Five Elders to call him a "Brat".

World Nobles
Luffy has also made enemies of the World Nobles after punching Saint Charlos for shooting his friend, Hatchan. Luffy utterly despises the World Nobles after witnessing their tyranny at Sabaody when Shaulia viciously mocked a brutally injured Devil Dias and cruelly shot him. Luffy almost lash out at Shaulia had Hatchan not interfered. Luffy even openly admitted that he hates the World Nobles while Hancock explained her past as a slave. During the Battle of Marineford, Kizaru stated that the nobles have been clamouring for his arrest. Luffy's detestment to the World Nobles was added to his despisement for Doflamingo after the latter revealed he used to be one.

Magellan
Luffy made a very dangerous enemy out of Magellan during his break-in at Impel Down. The fact that Luffy was the first to break into Impel Down was enough to infuriate Magellan. The chief warden severely poisoned Luffy during their first battle causing Luffy to lose ten years of his lifespan in a painful healing process. After realizing that Luffy survived his poison and had released more prisoners, Magellan did everything in his power to ensure that Luffy did not leave Impel Down alive.

Cipher Pol
Luffy and his crew are major enemies of Cipher Pol for declaring war on the World Government and for the latter's trying to kill Robin. Luffy originally thought the then agents of CP9 that he met at Water 7 were good people, but once he saw them trying to frame Luffy and his crew for killing Iceburg, destroying Galley-La Headquarters, and forcing Robin to accompany them, Luffy became enraged by their actions and became enemies with them.

Rob Lucci
Luffy's biggest enemy of CP9 is Rob Lucci. With Lucci, Luffy holds a deep hatred for trying to kill him and his crew and all of Galley-La despite knowing them for years. Lucci even personally attempted to make sure Luffy's crew would not survive Enies Lobby by flooding the underground passage from where they all in hopes of Luffy losing everything for his own enjoyment. Lucci continuously mocked Luffy, stating he's too weak to defeat Enies Lobby and save Robin. However, Lucci is one of the strongest opponents Luffy has ever faced and forced the Straw Hats captain to push himself beyond his limits to defeat him. Regardless, Luffy stated he is glad to have met them, due to him having become stronger from fighting them.

Blueno
Luffy viewed the agent Blueno an annoyance for standing in his way from getting to where Robin was. Blueno thought Luffy as a weak pirate but was surprised when Luffy thanked him for a good fight and helping him uncover his Gear Second. Luffy overwhelmed Blueno who realized that he underestimated him before he was defeated by the young pirate.

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