Toshi Toshi no Mi

The Toshi Toshi no Mi is a Paramecia-type Devil Fruit that allows the user to manipulate the ages of people or objects, making them an Age Manipulation Human (年齢自在人間). It was eaten by Jewelry Bonney.

Etymology

 * Toshi (年, 歳) is Japanese for "age" or "year".

Strengths and Weaknesses
The main strength of the fruit is that it allows the user to freely manipulate the aging process of anything, including themself, other people, and objects. They can use this power to disguise themself, as well as cripple opponents by rapidly aging their intended targets into their senior years or regressing them into small, weak children. A unique effect of this ability is that the years the user steals from people are manifested in the form of sparkling jewelry and shapes.



Any target whose bodily age has been altered by this power still retains all of their memories and cognitive abilities, as shown by the Marines and Bonney herself acting the same as normal, regardless of the age their body is showing them to be (though targets that have been reduced to toddlers have a tendency to cry as such). In addition, any markings the target may have will not be affected by this power, as Jinbe still retained his scar around his left eye after being turned into a child by this ability. Notably, the user also has the choice of employing possible alternate futures while aging herself or others forward in time. In the anime, Bonney glows pink while using her powers.

Like several other Devil Fruits, the fruit requires the user's hands to activate, although they are also capable of channeling its effects through weapons or any other object at their disposition. Blackbeard kept Bonney in line simply by chaining her hands to a post, though it is also possible that the chains were lined with Seastone, preventing her from accessing her powers.

The fruit's main weakness is that its aging effects, when applied to living things, are temporary, meaning victims will eventually revert to their rightful age at some point. One example is when Bonney was swept out to sea and unable to use her Devil Fruit powers, she reverted back to her true age prior to being rescued by the Straw Hat Pirates. Another setback of this fruit is that emotional outbursts by the user might result in unspecified altered ages for anybody in the proximity range of the user, including the user itself. This was seen when Bonney got confronted with a Pacifista resembling her father and it caused her to have an emotional breakdown, which then changed the age of everybody around her (except for non-biological beings) to an unspecific age, including herself.

Aside from this, the user suffers the standard Devil Fruit weaknesses.

Usage
Bonney mainly uses her ability to maintain the appearance of a woman in her early 20s in public. By shifting her apparent age up or down, she is able to fool people unaware of her powers into believing that she is somebody other than herself. She has been shown doing this in order to pretend to be related to someone (like how she did at the Sabaody Archipelago, by lying to Charlos about being Roronoa Zoro's little sister), steal food or to infiltrate restricted locations, all under the guise of someone else.

For combat, Bonney tends to employ her abilities on enemies by changing their age to extreme highs or lows, making them too old or young to engage in battle. Bonney is also able to tap into alternate futures with her forward-aging techniques, in case said futures provide a physical boost to her normal abilities.

Like many Devil Fruit users, Bonney can channel her abilities through foreign objects. She has been seen utilizing age-changing effects through both a pipe weapon and a pistol.

Techniques

 * Distortion Future: Bonney ages herself up into a possible future version, gaining a large and muscular physique, not unlike her father's, and becoming physically stronger as a result (enough to destroy metallic walls with ease). Bonney can also apply this technique to others like, for example, how she did to Monkey D. Luffy at Egghead's scrapyard, turning him into a 70-year-old man who was stated to come from a "different future". This move was properly named during Bonney's confrontation with Vegapunk. In the VIZ manga, this is called Distorted Future.




 * Toshi Tsuki (突き): While wielding a staff weapon, Bonney thrusts it into a target, aging them into a younger version of themselves. The target's lost years are manifested in the form of glittering jewels of various shapes. The name of the technique is a pun on toshitsuki (年月) meaning "months and years". In the VIZ manga, this is called Age Skewer.
 * Oil Shock: Bonney applies her aging effects to a metallic object, corroding and then breaking it. She first used this to destroy a door lock leading to a room in Vegapunk's laboratory. The name of the technique is a pun on oiru (老いる) meaning "to age". In the VIZ manga, this is called Oiled Shock.




 * NDE: Bonney pulls out a pistol and fires a projectile against the enemy. Instead of getting injured, the target rapidly ages until they turn into a skeleton before immediately reverting to their initial state, which may cause psychological trauma to them. Bonney first used this move against a group of Marine soldiers. "NDE" is an acronym for "near-death experience".

History
At an unspecific time and location, Jewelry Bonney unknowingly ate the Toshi Toshi no Mi. Following Sorbet Kingdom's Solo Revolution at age 6, Bonney subconsciously accessed the fruit's power in the church she was confined in, leading to herself becoming confused at its power, as well as her adoptive father mistaking Bonney for her late mother Ginny.

Trivia

 * Among named fruits, this one currently has the longest gap between when its power was first shown and when it was named, at 15 years, 5 months and 2 weeks. 597 chapters were released between its usage debut and when it was named in SBS.
 * The Toshi Toshi no Mi is similar to Kuma's Nikyu Nikyu no Mi and Big Mom's Soru Soru no Mi, being able to extract and sublimate intangible aspects of a living target, making them tangible (Bonney with age, Kuma with pain/fatigue and memories, and Big Mom with souls).
 * The aging and decaying power of this fruit is similar to that of the Juku Juku no Mi, which can age objects and people at will. The main difference is that the Juku Juku no Mi’s effects are irreversible and can only age things forward, while the Toshi Toshi no Mi’s effects are temporary and can age things both forward and backwards.

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