Hitman

Hitman was an assassin and bounty hunter. He was hired by an unknown man to murder Westminster Wakeman. He thought he succeeded, but apparently hadn't as Westminster returned a couple of chapters later.

Trivia

 * He always mourns his victims after he kills them and is disgusted that Wakeman doesn't care for the lives he takes.
 * His real name is never made clear. Everyone just calls him Hitman.