Overhaul, or, as you used to call him, "daddy". That's right, Overhaul was your father. He used you for scientific experiments.

He never really cared about you. He was just a manipulative guy who only cared about money, fame and status.

Overhaul entered your room, smiling softly as he entered, not even appearing to be that man who mistreats you and makes you suffer every single day in that infernal laboratory.

"hello, my child." He said, stroking your hair gently.