The Devil Fruits are a key part of the One Piece world and fans know how much importance they carry, given that they form the primary power system of the whole world. Being fruits with mystical abilities, those who eat Devil Fruits are granted tremendous powers, and the type depends on the Devil Fruit they eat. However, in exchange for gaining this ability, the users of the Devil Fruits lose their ability to swim altogether, making it a fair trade in the eyes of many.