Monkey D. Dragon is a major character in One Piece and the enigmatic leader of the Revolutionary Army, the organization opposing the World Government. He is the father of Monkey D. Luffy and the son of Monkey D. Garp. Known as the "World's Worst Criminal," Dragon is a mysterious and highly influential figure whose actions shape the series' larger political conflict. He represents resistance against tyranny and plays a crucial behind-the-scenes role in the struggle for freedom across the world.