A wandering independent mercenary who shelters with the Rubicon Liberation Front. Well versed in long-lost classical theater, he has a particular interest in ninjas and kabuki, relics of the past that he learned from the Japanese immigrant culture which now heavily influences his eccentric style. While an independent mercenary, Rokumonsen is more infamous for being one of the RLF's elite assassins. His mech, Shinobi, is a custom navy lightweight biped with a shotgun, plasma whip, and missiles.