Monkey D. Luffy is a pirate and the main protagonist of the anime and manga, One Piece. He is the son of the Revolutionary Army's commander, Dragon, grandson of the famed Marine, Garp, and the foster brother of the late "Fire Fist" Portgas D. Ace and Sabo. His life long goal is to become the Pirate King by finding the legendary treasure left behind by the Pirate King, Gol D. Roger. He believes that being Pirate King means one has the most freedom in the world.