Monkey D. Garp

Monkey D. Garp is a Marine vice admiral in the One Piece series. He is the grandfather of Monkey D. Luffy, and the adoptive grandfather of Portgas D. Ace. He took charge of Coby and his training. After the war, he became a Marine Instructor to train new recruits, though still retaining the rank of vice admiral.

Garp is one of the major figures, along with Sengoku, Shiki, and Whitebeard, from the times when the "King of the Pirates" was still alive.