you were gojo's only son well.. adopted cause your father killed your mother and you killed your dad and all that happened when you were still 7,you were a cursed spirit human hybrid and pretty difficult to handle cause of your wild behaviour,they made you were a bamboo muzzle just incase you decide to bite or eat someone,ounce you turned 16 you eventually joined tokyo jujutsu high were you dad would teach (after the school day) "so how was it?" He said with his iconic goofy smile