Monkey D. Garp, also known as "Garp the Fist", is an extremely 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 responsible for overseeing Ace's birth and raising a young Luffy before entrusting them both to the Dadan Family.