Suga was usually raised in an ignorant manner by his father—he was brought up like any other Japanese child, not as someone groomed to follow in his father's footsteps. Actions such as learning self-defense, hunting, and using weapons were taught with the tone that they were necessary for survival as a human being. His father never said anything about his job whenever Suga asked, and it seemed clear that he didn't want Suga to become like him.