Akio

This character is a loyal former classmate of Kyohei who was taken in by a Yakuza member named Eiji. Through a transformation by a doctor into a Cyberoid, he engaged in a solo conflict against the Yakuza. When Eiji betrayed him, Akio retaliated violently, ultimately defeating Eiji and the Yakuza boss, though the ordeal left Kyohei deeply saddened by the loss of his friend.