Tony Tony Chopper

A reindeer who ate a Devil Fruit and gained human form and speech, Chopper was shunned by animals and people alike until a quack doctor took him in. He joins the Straw Hats to become a physician capable of curing any disease. Timid, easily flattered and prone to weeping, he combines medical knowledge with the ability to shift into several combat-ready bodies.

A blue-nosed reindeer who ate a Devil Fruit, normally seen in a compact, rounded humanlike form barely waist high on his crewmates, with light brown fur, antlers, hooves and an oversized pink top hat marked with a cross. He wears cargo shorts and, after the crew's separation, a short backpack-like satchel of medical supplies. His other transformations range from a quadruped reindeer to a stocky fighting shape and a towering, shaggy beast several times the height of a man.

Earnest, kindhearted and painfully easy to embarrass, Chopper dances with delight when insulted and tries to hide behind objects far too small for him. He is a hopeless liar, believes nearly everything Usopp says, and loves sweets with single-minded devotion. Underneath the timidity is a disciplined physician who takes the oath he inherited seriously: he will treat anyone, including enemies, and he becomes genuinely furious at those who use medicine as a weapon or torment the sick. Having spent his early life rejected by both reindeer and humans, he treasures belonging to the crew and panics at the thought of losing any of them. His ambition is to cure every illness in the world.

Born a reindeer with an unusual blue nose, he was driven from his herd for being different, then shot and injured by hunters after eating the Human-Human Fruit left his body half-human. The village of Drum drove off the strange creature on sight. He was taken in by Doctor Hiriluk, a cheerful quack who believed no illness was incurable and who named him; when Hiriluk died, Chopper went on to study under the brilliant and abrasive witch doctor Kureha, learning real medicine on a snowbound mountain. He lived there, isolated and grieving, until a pirate crew carrying a desperately sick navigator climbed to find him.

1. Drum Island

   Living atop a snowy peak with the witch doctor Kureha, he treats Nami's fever and clashes with the returning tyrant Wapol, who once mocked his late mentor. After defeating the king's forces alongside the crew, he is persuaded to leave the mountain and join a ship as its doctor, departing with cherry blossoms falling over the island.

2. Enies Lobby

   Crossing the government stronghold to recover Robin, he overdoses on his transformation drug and loses control, rampaging as an uncontrollable giant that endangers friends and enemies alike. Being stopped and forgiven pushes him to redesign the drug afterward so that the monstrous form becomes a tool rather than a disaster.

3. Punk Hazard

   On a burning and frozen island he finds children used in gigantification experiments and poisoned with an addictive drug. Working with Law, he synthesizes treatment and personally carries the rescue, confronting a scientist who treats patients as material. The arc gives his ambition to cure every disease its clearest expression.

4. Wano Country

   When an engineered plague sweeps the isolated country, Chopper analyzes the virus and distributes a cure during the battle at Onigashima, working against the plague's creator while the fighting rages around his makeshift clinic. He also treats the wounded alliance leaders, keeping the assault alive through sheer medical triage.

Hiriluk

Adoptive mentor

The optimistic quack doctor who took in a creature everyone else chased away and taught him that illness can always be fought. His dying belief in cherry blossoms over a snowbound island remains Chopper's guiding idea.

Kureha

Teacher

The sharp-tongued, ancient physician who drilled real medicine into him on the mountain. She was harsh, demanding and sent him off with the advice that he still had everything left to learn.

Usopp

Best friend aboard ship

Chopper swallows Usopp's inventions whole and the two share the crew's panic reflex. Usopp in turn enjoys having an audience who never doubts him, and the pair often handle support work together.

Luffy

Captain

The first person to want him simply because he was interesting rather than useful. Chopper is fiercely protective of him as a patient and routinely scolds him for reopening injuries.

• He abandons his mountain refuge to join a pirate crew after they treat him as a person rather than a monster.
• He loses control of his largest form at Enies Lobby and has to be stopped by his own allies.
• He develops a cure for a chemically induced addiction afflicting captive children on Punk Hazard.
• He races to distribute an antidote during a manufactured plague in the middle of a full-scale battle.

• His dream is to become a doctor capable of curing any disease in the world.
• He is obsessed with cotton candy and keeps a stash aboard the ship.
• After becoming famous, his reward poster long showed only a picture of an ordinary animal, to the amusement of the crew.
• He hides by standing behind objects far narrower than he is, convinced it works.

• Monkey D. Luffy
• Roronoa Zoro
• Nami
• Usopp
• Sanji
• Nico Robin

• Franky
• Brook

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