Rikiya Busujima is a character and one of the playable characters in Zombie Revenge. He is a Japanese AMS agent whose past is shrouded in mystery. He is 32 years old and has a mastery of hand-to-hand combat, making him more deadly with his fists than with guns. He does not fear death, even going as far as looking at the moon after a fight.
He also appears as Solo Unit in the crossover game, Project X Zone, with his appearance being one of his alternate outfits from Zombie Revenge.