Fuyuhiko is the heir to the Kuzuryu yakuza clan, the largest criminal syndicate in the nation, with a membership surpassing 30,000.[13] He grew accustomed to the Kuzuryu Clan's way of settling disputes through violence, leading him to believe that as long as he bore his family name, he would always be surrounded by a mountain of dead bodies. His upbringing toughened him so much that he no longer cried about anything, including losing a fight by second grade. Being treated with caution by non-clan members was second nature to him due to his status. Ever since Fuyuhiko was too young to understand, he had often witnessed his parents' frequent fights. It involved his mother's various attempts to kill his hotheaded father during minor arguments that quickly escalated. There were a few instances when Fuyuhiko was nearly killed in the aftermath of his parents' fights, but his assigned hitman, who had accompanied him since infancy, Peko Pekoyama, was always there to protect him.