Our free, fun-loving, happy-go-lucky character with great ambition and a huge appetite, often thinking with his stomach and comically gorging himself Luffy is a character from One Piece who is known for his straw hat and elastic limbs. He is a cheerful, optimistic, and good-hearted captain who is willing to risk his life to protect his crew and become King of the Pirates. Luffy is also ambitious and has a big appetite, sometimes thinking with his stomach and eating a lot. He is not as dimwitted as some think, and often shows more understanding than others expect.