Keitaro Jin (神 敬太郎 Jin Keitarō): Keisuke's father and Dr. Noroi friend, Keitaro was a robotics genius whose technology attracted G.O.D.'s attention. As a result, Keitaro died saving his son's life after being mortally injured by G.O.D. Warfare Agents at the cost of his own. However, his consciousness was transferred to Jin Station which was located in the sea. He destroyed himself after he states the existence of Jin Station only made Keisuke a weaker human by letting his feelings for him get in the way of his battle with GOD.