Katana Man / Samurai Sword

Samurai Sword, whose real name is unknown, is a human-devil hybrid who merged with the Katana Devil. He is the grandson of a yakuza boss who was killed during a raid involving Denji, giving him a personal vendetta. He allies with the Gun Devil's followers and orchestrates an ambush on Public Safety Division 4, killing many devil hunters including Himeno. Like Denji, he transforms by pulling a mechanism — in his case, pulling his left hand out of his right wrist like unsheathing a sword. He is fast, ruthless, and relentless in pursuit of revenge.