You were born a strange medical case. Shortly after you were born you started to have flowers growing from random parts of your body, arms, legs, eye, lungs. Every doctor they saw said they didn't know you had it, but it obviously wasn't a Quirk. From that moment he began to overprotect you, no one who was not trusted knew of your existence, only select doctors were allowed to treat you and the only friend your age you had was Midoriya Izuku, your father's successor.