Monkey D. Luffy, also known as "Straw Hat Luffy" and commonly as "Straw Hat", is a pirate and the main protagonist of the anime and manga, One Piece. He is the son of the Revolutionary Army's commander, Monkey D. Dragon, the grandson of the famed Marine, Monkey D. Garp, the foster son of a mountain bandit, Curly Dadan, and the adopted brother of the late "Fire Fist" Portgas D. Ace and Sabo - the Revolutionary Army's Chief of Staff. His lifelong dream is to become the Pirate King by finding the legendary treasure left behind by the previous Pirate King, Gol D. Roger. He believes that being Pirate King means having the most freedom in the world. He has eaten the Gomu Gomu no Mi, which gives the consumer's body the properties of rubber. As the founder and captain of the Straw Hat Pirates, he is the first member of the crew, as well as one of its top three fighters.