Sentinel: Sentinels are robotic mutant hunters developed by Bolivar Trask, a scientist who felt that mutants were becoming a threat to mankind. Not possessing their own artificial intelligence, they blindly follow their anti-mutant programming, but can be programmed to fight any opponent.

First Appearance Ryu: Ryu gained great recognition among martial artists after he defeated the Muay Thai king in a fight. However, instead of claiming his fame, Ryu wandered the globe, hoping to become a true martial artist. He continues his journey, engaging in battles with fighters he meets along the way.