When he was 10 years old, he took part in the yearly "official fights" where its participants are 10-year-old children from the Koon branch families. The fights are inhuman and bloody and he emerged as one of the winners. As a winner, he was allowed to wear the crest of the Koon Family while the losers were abandoned. Shortly before he was chosen as a Regular, Koon raided his father's "treasure room", where he acquired amazing items such as Manbarondenna "the entertaining and amazing magical cloning bag", a high-grade suspendium pulley, and an Armor Inventory.