Ain

Biodata

Power Progression

Appearance

• Hair: Long, dark-blue hair, also described as sea-blue in sunlight 8 27.
• Eyes: Red 8.
• Build: Slender and athletic, with visibly toned muscles reflecting her continued training 3 8.
• Clothing: Wears short shorts at her introduction and later receives a Justice Coat from Lofan when she returns from Garp’s training 3 26.

Personality

Ain is meticulous, hardworking, and initially intensely afraid of disappointing Zephyr. After becoming Lofan’s adjutant, she performs every assignment without complaint, but her determination to avoid even minor mistakes leaves her visibly strained. Beneath that discipline, she is still grieving the attack that killed her fellow students 8.

Her commitment to justice centers on defeating pirates so ordinary people can live peaceful, happy lives. She initially treats Zephyr’s refusal to kill as a principle she must never contradict, even when considering revenge against Edward Weevil. Lofan encourages her to inherit her teacher’s spirit without surrendering her own identity 8 27.

Her admiration for Lofan does not eliminate her doubts. She questions his decision to release Kaido and his secret search for a girl, and hesitates when he asks whether she would use her ability against her own sense of justice. Nevertheless, she chooses to trust him and eventually resolves to become strong enough to stand beside him 14 27 34.

As she gains confidence, Ain becomes more willing to tease and challenge him. By the time she oversees the Search Bureau’s administration, she can recognize his attempts to evade uncomfortable questions and confront him directly 26 55.

Abilities & Skills

Return-Return Fruit

Ain is a “Reversing Human” whose Devil Fruit can reverse a target’s state. Its activation produces a peach-colored glow around her hands 13.

• Injury reversal: Restores Lofan from his severely wounded condition after fighting Kaido to peak condition 13.
• Stamina restoration: Reverses his exhaustion along with his injuries 13.
• Broader effects: The ability is described as capable of reversing the state of matter and even erasing a person’s existence 13.
• Voluntary cancellation: Ain can undo the effect, causing Lofan’s original burns and injuries to reappear 14.
• Limit: The reversal is not permanent. If she loses consciousness or dies, its effects disappear and affected targets return to their normal timeline 13.

Physical Combat and Haki

Ain receives instruction from both Zephyr and Garp, with Garp developing her foundations in hand-to-hand combat and Haki 3 23.

• Maintains her physical conditioning even while assigned clerical duties 3.
• Trains intensely for more than a month under Garp 25.
• Follows a hand-to-hand combat path rather than the swordsmanship path Lofan had expected for her 26.
• Her training does not establish mastery of a specific named Haki technique or a demonstrated victory over a major opponent 23 26.

Administration and Organization

Ain’s clerical proficiency earns her the position of Lofan’s adjutant and later makes her central to the Search Bureau’s operation 8 45.

• Operational support: Relays reports, handles documents, and retrieves charts for voyage planning 8 27 30.
• Personnel administration: Helps Laiyin and Geluusi confirm the bureau’s membership roster and prepares for future assignments 34.
• Department formation: Is appointed acting Minister of Internal Affairs to establish its departments; the appointment is explicitly temporary, with a successor to be chosen by the director afterward 39.
• Education: Prepares training materials and political-education classes, receiving direct help from Lofan when her lack of teaching experience becomes an obstacle 39 40.
• Headquarters management: Makes a major contribution to the bureau’s relocation to Punk Hazard and later assumes coordination with Marineford 55 56.

Medical Care

• Bandages and treats Lofan after cancelling the reversal of his injuries, allowing him to undergo conventional recovery 14.

History

Surviving the Attack on Zephyr

Ain and Binz survive Edward Weevil’s attack, which costs Zephyr his right arm and kills many of his students. Both remain beside their teacher afterward, serving in clerical roles out of affection and respect rather than leaving to pursue their own careers 3 8.

When Lofan returns to Marineford with Jack the Drought captured, Zephyr asks him to take the two survivors aboard his warship. Ain is initially nervous around the celebrated Marine prodigy. Her skill with paperwork soon leads Lofan to make her his adjutant 3 8.

The Kaido Operation

Ain selects an uninhabited island away from the G-11 branch as a battlefield for Lofan’s confrontation with Kaido. During their inspection, Lofan addresses her lingering trauma and urges her to find a life beyond simply accommodating Zephyr’s wishes. When he suggests that she should avenge their teacher herself, she breaks down over the apparent conflict with Zephyr’s teachings 8.

After the battle, Lofan calls Ain to the island alone. She reverses his injuries and exhaustion, then embraces him in relief. Later, at his request, she cancels the effect and treats his wounds. His decision to let Kaido leave and his request for a secret search trouble her, but she decides to trust him 13 14.

Garp’s Training in the East Blue

Lofan arranges for Ain to receive special training while he is away. Garp takes her to Foosha Village, where Luffy and Ace also become part of his training regimen. Ain grows fond of their noisy daily life, which reinforces her wish to help create a peaceful world 16 21 23.

After more than a month of intensive training, she returns to duty aboard Lofan’s ship. Luffy is reluctant to see her leave, while Lofan welcomes her back with a Justice Coat and jokes about her becoming “Iron Fist Ain” 25 26.

On the return voyage, Lofan asks whether she would use her Devil Fruit for him even when doing so conflicted with her justice. She cannot immediately answer, and he leaves the question for her to consider 27.

Building the Search Bureau

Ain delivers Lofan’s reform orders to the Navy Investigation Bureau and takes part in its restructuring. While he is away, she works on personnel records and welcomes Binz when he applies to transfer into the organization 30 31 34.

Lofan appoints her acting Minister of Internal Affairs, responsible for building the ministry’s departments. Her unfamiliarity with teaching leaves her overwhelmed by the task of preparing educational materials. Lofan realizes he has failed to supply the necessary source material and helps her write the lessons himself. Their discussion introduces her to his guiding principle of “serve the people,” deepening her hope that he can bring peace 39 40.

Ain subsequently becomes responsible for the bureau’s administration, earning Lofan’s thanks for keeping it running smoothly. Her duties keep her at headquarters rather than accompanying him on operations, and she plays a major role in the move to Punk Hazard 45 55.

When rumors about Lofan’s personal conduct reach Punk Hazard, Ain confronts him and volunteers to take charge of his branch liaison matters. He subsequently entrusts all coordination with Marineford to her 55 56.

Relationships

• Zephyr — Teacher and deeply cherished mentor. Ain stays beside him after the attack and fears betraying his principles. Lofan believes Zephyr regards her as his own daughter 3 8.
• Lofan — Commanding officer and fellow student of Zephyr. He supports her emotional recovery, arranges her training, and entrusts her with major administrative responsibilities. Binz interprets her increasingly personal admiration as having gone beyond ordinary respect, but no romantic relationship is established 8 16 39 40.
• Binz — Fellow survivor and close colleague who regards her as a younger sister. They share devotion to Zephyr and reunite in the Search Bureau 3 34.
• Monkey D. Garp — Instructor in physical combat and Haki. He supervises her intensive training and insists that she rest before leaving Foosha Village 23 25.
• Monkey D. Luffy and Portgas D. Ace — Fellow participants in Garp’s training. Ain becomes fond of their daily antics; Luffy clings to her hand when she prepares to leave 21 23 26.
• Laiyin and Geluusi — Search Bureau colleagues with whom she works on personnel records during the organization’s restructuring 30 34.
• Mary / Nico Robin — Bureau colleague whose arrangements Ain oversees so she can live safely without leaving the Search Bureau building 36 38.

Notable Quotes

“Wiping out every last one of those worthless pirates! Giving ordinary people peaceful, happy lives.” 27

“But someday... someday! … I’ll stand confidently beside him and show those damned pirate scum! … What it means for justice to reign over the world!” 34

Trivia

• “Iron Fist Ain” is a prospective nickname, used by Lofan while teasing her after Garp’s training—not an established public epithet 26.
• Lofan includes Ain among his prospective Espada candidates because of her loyalty and useful Devil Fruit ability; the supplied chapters do not show her becoming an Espada 27.
• Her office displays the principles “Fairness, impartiality, transparency” during the Search Bureau’s formation 34.