Shuichi Kageyama

Shūichi Kageyama (蔭山 秀一): Thinking himself an orphan, named Kōichi Nakamura (中村 公一), he learns he is in reality Shūichi Kageyama, the son of Doctor Man and basis of Prince's design. At first, Doctor Man tries to get him to join Gear, but Shūichi rejects Doctor Man. Eventually, Shūichi finds and joins Doctor Shibata. Later, he helps the Bioman ultimately defeat Gear. He manages to convince Doctor Man to help them stop the bomb that could destroy the whole Earth through the use of human emotions.