Monkey D. Luffy

Monkey D. Luffy (モンキー･D･ルフィ Monkī D. Rufi^?) 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, the grandson of the famed Marine, Garp, the foster son of a mountain bandit, Curly Dadan, and the adopted 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. He has eaten the Gomu Gomu no Mi. As the founder and captain of the Straw Hat Pirates, he is the first member that makes up the crew as well as one of its top three fighters.
Luffy has a worldwide reputation for causing trouble, even among the Shichibukai, the Marines, and even challenging a Yonko, committing crimes against, as well as actions that were deemed threatening by, the World Government. He has gained a reputation for being "reckless" and, in some cases, "insane", after causing an incident in Enies Lobby, entering and escaping from Impel Down, and joining the Battle of Marineford. He is, therefore, famous for being the only pirate to not only break into the three most important government facilities, but also escape from all of them alive. Including the fact that he punched a Tenryubito with full knowledge of the consequences, as well as his heritage, has caused Luffy to be labeled as a "Dangerous Future Element".
These acts, amongst other things, have given him his current bounty of 400,000,000, one of the highest past or present bounties in the series. Having had a bounty of 300,000,000 prior to his arrival at the Sabaody Archipelago, Luffy was one of eleven rookie pirates who had been referred to as "The Eleven Supernovas", the eleven pirates with bounties over 100,000,000 to have reached the Red Line.