Devil Fruit

Swallowing a Devil Fruit, known in Japanese as the Akuma no Mi, grants the eater one distinct ability from the instant it goes down, at the permanent price of never swimming again. Only a single person may hold a given power at any moment, and once that person dies the ability grows anew inside a fresh fruit somewhere in the world. Carrying two powers is forbidden, a rule Marshall D. Teach alone has ever broken. Three broad families sort the fruits: Paramecia, the most common, handing out an enormous variety of superhuman traits; Zoan, which let the eater transform into an animal; and Logia, the scarcest and usually strongest, which turn the body into a natural element. Each specimen wears a distinctive swirled skin and tastes dreadful, while the manufactured kinds carry ringed markings instead. Their true origin escapes even the genius Vegapunk, who guesses they represent branching possibilities of human evolution sparked by human longing, with the sea itself despising those who bear their powers. Recorded for at least eight centuries, over a hundred separate fruits are said to exist, scattered so sparsely that many seas dismiss them as myth, with the Grand Line hosting the greatest concentration.

A single bite is all it takes, and the power then stays with the eater for the rest of their life, released only by death, after which any leftover pieces of that fruit fall inert. Consumption rewrites the eater's Lineage Factor, a finding that let scientists start reproducing fruit abilities artificially, yet the alteration neither shortens lifespans nor passes down to offspring. Attempting to claim a second power brings an immediate, body-shattering death, a fate only Teach mysteriously avoids. Powers generally carry through a user's clothing and even prosthetic or cyborg parts, which stretch and change alongside the body. Every fruit shares one headline flaw: the eater becomes what is nicknamed a hammer, draining of strength and motion when deeply submerged in any still, enclosed body of water, seawater or not. Splashing or moving water such as rain causes no harm, and a user sealed in airtight gear can still act underwater. Seastone, a hardened form of the sea's own energy, saps a user on contact exactly as water does, which is how Impel Down holds its inmates, though unusually durable fighters can partly resist the drain. An overwhelming surge of Haki can likewise override a fruit's effects. Raw power counts for little without practice, so wielders must train to understand and refine what they wield, and the rarest, most disciplined reach an Awakening, a further stage that tightens control, unlocks fresh applications, and in certain cases spreads the power onto the surrounding environment.

A great many prominent figures owe their fame to these powers. Monkey D. Luffy stretches like rubber from a fruit long mislabeled the Gomu Gomu no Mi, which is truly a Mythical Zoan, the Nika-model Hito Hito no Mi. Marshall D. Teach uniquely wields a pair of powers: darkness from the Yami Yami no Mi, plus the quake force of the Gura Gura no Mi that once belonged to Edward Newgate, reputedly the mightiest Paramecia ever seen. The Ope Ope no Mi, held by Trafalgar Law, earns the label of Ultimate Devil Fruit for its power to heal any illness. Caesar Clown together with Donquixote Doflamingo built the synthetic SMILE fruits, while Vegapunk crafted artificial versions of his own. Even so, towering fighters who eat no fruit at all, among them Gol D. Roger, Silvers Rayleigh, Dracule Mihawk, Shanks, and Monkey D. Garp, show that the fruitless can rank among the very strongest, a point Kaidou drives home by placing Haki above any fruit's power.