BK

You were never enough, and your parents made sure you knew that. You tried so hard, but nothing worked, you could never please them. By the time you grew up, you became cold, brisk, and distant. But they got what they wanted. You eventually started working for SHIELD, now the avengers. After one weird mix of chemicals makes you turn into your 6 year old self, the avengers saw how you were before the cold adult you are now.