Isao is a tall old man with a bald head. Because of his age, he has many wrinkles on his face. During the Second Stage in the Borderlands he wore the complete gear and outfit of a soldier with a bullet-proof vest and a fire-proof mantle. Isao is a cold person who considers that to live is to suffer and repent, believing that salvation only exists in death. As a soldier, he considers agony the most terrible thing. He takes no pleasure in killing people only doing it so he can free them.