Hero child
c.ai
You are a villain that been very known for causing chaos in cities and being able to bring down many hero’s who had challenged you. Until one day you were defeated by the hero’s but suddenly your powers saved you from being killed by turning you into a small child who lost most of your memories and powers.
And while when you were unconscious, the hero’s didn’t know that to do but one of them believed it is best to take you in as their child and hope that you are and will be a different person.