Onimaru

Onimaru is a komagitsune who was once the companion of the late daimyo of Ringo, Shimotsuki Ushimaru.

After the death of his master, he joined forces with Kawamatsu in collecting weapons for the final battle against Kaidou and protecting them from robbers. After Kawamatsu was captured, Onimaru posed as a human known as Gyukimaru on Oihagi Bridge, stealing weapons from people while continuing to guard the graves.

Appearance
Being a komagitsune, Onimaru heavily resembles a fox, with his fur and tail having a flaming composition, and his pointy ears have a swirly appearance. His fur is light, with his legs being dark below the knees. He is rather large, appearing to be over half the size of the very large kappa Kawamatsu.

As Gyukimaru, he is a very large man with a face resembling a mask. He wears a dark kimono, light pants, and a light cape, and carries many weapons on his back. He also wears a very large bead necklace.

Personality
Onimaru is fiercely protective of the graves of those buried in Ringo, and has tirelessly worked to protect them for almost two decades, enduring multiple injuries in the process but never wavering.

Onimaru is very violent against those who try to violate the graves. It was only when Kawamatsu offered Onimaru his arm that the fox let the samurai take the weapons from the graves. As Gyukimaru, he was unwilling to believe Roronoa Zoro's claim that he had rightfully obtained Shusui from Ryuma. He does not seem to take much interest in activities outside of guarding the graves and stealing weapons from passersby.

Onimaru has shown in his Gyukimaru transformation that he is very intelligent and aware of the legends and history of Wano. This is seen as he greatly reveres the legends of Ryuma, and so went to great lengths to return Shusui to his grave, as he left Ringo and went to Ebisu Town near the Flower Capital just to take it back. He is rather pragmatic in battle and always looks for an opening on his opponent, even when they are distracted or caught up by something else altogether. However, he is merciful enough to not attack an opponent who can no longer fight.

Abilities and Powers
Onimaru is a skilled thief, being able to successfully steal Shusui from Zoro and make his way halfway across Wano Country at a fast pace.

His jaw is quite strong, as he was able to instantly cause considerable injury to Kawamatsu's arm by biting it. He also has considerable endurance, as he stood to protect the graves after being struck by arrows, and in the present day, he was able to withstand a bazooka shot from one of the Beasts Pirates.

Devil Fruit
Onimaru ate the Hito Hito no Mi, Model: Onyudo, an Mythical Zoan-type Devil Fruit that allows him to transform into a full monk yokai and a fox-monk hybrid at will. Onimaru is able to transform into a large humanoid, who is known as Gyukimaru. As Gyukimaru, he is capable of human speech.

Befitting his size, Gyukimaru has enormous strength as he could match Zoro's physical power. He also has great speed, able to match Zoro's agility, though in their next match, he was overwhelmed by Zoro, implying he might have had an advantage in the first match because he caught the swordsman off-guard.

Spearmanship
Gyukimaru has been shown to be extremely skilled in wielding his naginata, able to clash evenly with the powerful swordsman Roronoa Zoro. He has been shown using the handle of the staff to counter Zoro's sword strikes.

Weapons
While acting as Gyukimaru, his main weapon is a very long naginata, which grants him great size and range in addition to cutting power. He also carries around a very large variety of weapons on his back.

Past
Onimaru served as the companion of the daimyo of Ringo, Shimotsuki Ushimaru, until around 18 years ago when Ushimaru was slain in rebellion against Kurozumi Orochi and Kaidou. For around five years, he remained around the region's main cemetery, protecting it from robbers even as Orochi and Kaidou turned Ringo into a wasteland.



13 years before the present day, Onimaru was chasing away some members of the Beasts Pirates when he encountered the samurai Kawamatsu. He collapsed from receiving multiple wounds, and Kawamatsu nursed him back to health. After regaining his strength, Onimaru opposed Kawamatsu's effort to collect the weapons of the buried, feeling betrayed bit into his arm. Kawamatsu revealed that he wished to collect the weapons for a planned final battle against Orochi and Kaidou, but Onimaru did not budge. However, he relented when Kawamatsu offered him his arm, and licked away the blood from the wound he dealt. Onimaru then assisted Kawamatsu in collecting the weapons, and Kawamatsu aided him in protecting the graves from robbers, disguising himself as "Gyukimaru" when chasing them away.

Less than a year later, Kawamatsu was captured during a trip to the Flower Capital, leaving Onimaru alone again. As 13 years passed, Onimaru appeared to people as a human, donning Kawamatsu's alias of Gyukimaru. As Gyukimaru, he ambushed anyone who crossed Oihagi Bridge and stole their weapons, and stored all of them in an underground chamber.

Wano Country Arc
Gyukimaru was in Ebisu Town when he spotted the sword Shusui and took it. He went to Ringo and returned it to Ryuma's grave before he was confronted on Oihagi Bridge by Roronoa Zoro, from whom he had taken Shusui. Refusing to believe Zoro rightfully earned the sword, Gyukimaru battled him to take his other two swords. A woman and a girl then came onto the scene being chased by Kamazo, and as Zoro turned his attention to Kamazo, Gyukimaru repeatedly tried striking at his openings, annoying the swordsman. After Zoro defeated Kamazo, Gyukimaru took the assassin's scythe and walked away as Zoro fainted from the wound he received from the assassin.

Two days later, Gyukimaru was once again confronted by Zoro, who was determined to take back Shusui. Kawamatsu then came and interrupted the fight, and Gyukimaru was attacked by some Beasts Pirates who came seeking revenge on him for stealing their weapons. As Kawamatsu and Zoro fought the Beasts Pirates, Gyukimaru fled with tears of joy from learning that Kawamatsu was alive. He ran to the main cemetery while being chased by Zoro, and opened up the entrance to the secret room where he stored all the weapons in. After watching Zoro lead Kawamatsu and Hiyori into the room, Gyukimaru transformed back into Onimaru. He would later reunite with Kawamatsu in Ringo after the Raid on Onigashima where Kawamatsu, Marco and Kin'emon sat at a shrine dedicated to all fallen Oden's vassals, daimyos and Oden himself.

Major Battles

 * Onimaru vs. Beasts Pirates
 * Onimaru and Kawamatsu vs. grave robbers (multiple times)
 * Gyukimaru vs. Beasts Pirates (unseen)
 * Gyukimaru vs. Roronoa Zoro (twice)

Trivia

 * Onimaru and his Gyukimaru transformation are possibly based on Benkei, a Japanese warrior monk who was said to have taken weapons from the samurai he defeated and believed to be arrogant and unworthy.
 * Benkei became the loyal retainer of Minamoto no Yoshitsune, whose childhood name Ushiwakamaru (牛若丸) may be the basis for Shimotsuki Ushimaru's name.
 * Onimaru's name may be based on Benkei's childhood name Oniwaka (鬼若) or Oniwakamaru.
 * His name may also come from Onimaru (鬼丸), a sword classified as an Imperial Property of Japan and one of the Tenka-Goken. Its name comes from a story where it moved by itself and killed an oni that was cursing Hōjō Tokimasa.
 * "Gyukimaru" is likely a combination of his former master Ushimaru's name and his own name Onimaru, as Gyūki (牛鬼) is another pronunciation for ushi-oni.
 * Onimaru transforming into Gyukimaru is likely based on the fox spirits of Japanese folklore, which can shape-shift into human form among other abilities.
 * Onimaru is similar to Chouchou, as they are both canines who were once companions of now-deceased men. When their companions passed away, they both devoted their lives to protecting locations formerly controlled by their companions from criminals.
 * Onimaru's favorite food is abura-age.

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