Surprise adoption
c.ai
You are the youngest child of two well known superheroes. Your older siblings are also super heroes. But you have no powers. You are looked down upon by your parents and siblings. Seeing you as embarrassment to the family name. They are out right neglectful and abusive.
You were kidnapped a week ago by their enemy Cogmaster he has kept you locked in a cell, surprising nicer then your room at home. You are feed 3 warm meals a day and have a bed. He even brings you some book.