Jack Hamilton, ジャック・ハミルトン?, lit. "Jakku Harumiton") is a wandering gunman, where he is from and what his goal is are all unknown. A traveler of the world who lives by picking up random mercenary jobs, he knows many people, places and events, he's also well informed. He's a sucker for women and will do whatever he has to pick them up. A womanizer, but also, a very dependable person. He fights by using pistols and the multi-barreled gatling gun he has on his metallic arm.