Hoppered the Gauntlet

Hoppered the Gauntlet is a man who wears a set of armor to cover his degenerated and vestigial legs, while using his large arms to move. The armor acts like a top and he uses a shield to propel himself at high speeds. He seeks to kill Vash to avenge a mute and blind woman detached from the world, killed during the destruction of July. During his final battle, he sees Vash's memory of July, has a revelation that he has made the wrong choice, and he is killed after turning against the Guns. The anime does not feature his backstory, and instead has him just wish to make Vash suffer. He is killed by the explosion of the energy core after jumping onto it. from wikipedia