An assassin working for the US. He possesses an iron body and is almost invulnerable to anything. He and Yujiro crossed paths while he was sent to assassinate a drug cartel leader. He also has one bizarre technique in which he curls into a perfect sphere of muscle in which he is impervious to attacks, but can uncurl and seize his opponents, 'eating' them "like Pac-Man". He then crushes them with his muscles. His appearance and name are based on former Mr. Universe and three-time Mr. Olympia Sergio Oliva.