Monkey D. Garp is a famous and powerful Marine vice admiral. He is the father of Monkey D. Dragon, the paternal grandfather of Monkey D. Luffy, and the adoptive grandfather of Portgas D. Ace. He was also the commanding officer of the 153rd Branch of the Marines and the man in charge of both Koby and Helmeppo. He is close friends with his former superior, Sengoku.