Gasu Gasu no Mi

Caesar Clown, the mad scientist, is the holder of this Logia, which English releases title the Gas-Gas Fruit. Debuting in Chapter 658 and Episode 581, with Law later confirming its class, the power lets its eater create, command, and transform their body into gas at will. The name comes from gasu, the Japanese rendering of the English word gas.

Its foremost strength is becoming a gaseous body, which lets Caesar drift, fly, and enter spaces a solid form could never reach, such as the flasks he hides inside, while still condensing dense enough to hold objects. He can lace the gas with poison, and it turns explosive when ignited, giving him controlled detonations. More alarming still, he manipulates whatever gases already fill a room and can smother opponents by drawing out the oxygen around them, an instant-kill tactic that even fells a fellow Logia. He can further fuse with nearby gases to swell his own power while staying immune to their toxins. The gas form is fragile against fire, though voiding the local oxygen halts combustion and offsets that, and controlling oxygen seems to take concentration or a solid state, so a hard hit can break it and let victims breathe once more. Caesar tends to keep the power running, lending him a half-gaseous look. His named techniques run deep: Gas Robe is a lethal poison cloud, Gastanet claps a huge blast from castanets, Karakuni voids all nearby oxygen to asphyxiate everyone in range, Nenshokei: Miok Gas torches concentrated flammable gas into a fireball, Blue Sword forms a searing oxidized flame from a bladeless lighter, Gastille fires an exploding beam of lit gas, Shinokuni is a giant form seized by absorbing petrifying gas, and Roko neutralizes his deadly Koro weapon. He also carries the usual Devil Fruit weaknesses.

The fruit is held by Caesar Clown, once a peer of Vegapunk and now an underworld weapons maker. In combat he lets loose gases that kill an average victim instantly, ignitable clouds of tremendous force, or hallucinogenic fumes that turn enemies against one another, and he strips the oxygen away to suffocate foes while erasing his fire weakness. The Straw Hats later coerced him into becoming a hot air balloon and a makeshift net. He bristles at any comparison of his Logia to Magellan's Paramecia poison fruit.