The first Phirasaurus Human (人間ピラザウルス Ningen Pirazaurusu, 16), also simply known as Phirasaurus (ピラザウルス Pirazaurusu) after the prehistoric creature he was modified from, was a piranha-dinosaur Shocker cyborg. He had the human guise of a bus driver, and after using his "Death Fog" ability to kill a group of humans in a bus it was discovered his poison was so potent it killed him as well. Phirasaurus was a project from Shocker commander Maya (マヤ Maya), and she quickly looked for a stronger person to be altered.