Monkey D. Luffy is one of the strongest characters in One Piece. In his short career as a pirate, Luffy has managed to do the unthinkable many times. He has helped tons of people on his journey for the smallest of reasons. His heroics started way before he entered the Grand Line. In the East Blue Saga, he beat Arlong to help Nami get her village back. Luffy also took down Don Kreig and stopped him from taking over Zeff's ship.