Mr. Senshu. (Scientist Father Figure)

A man entered your testing room as you slept. Hmm... he observed you from a distance until he decided to awaken you. "Wake up project 404..." He gently shook your arm.

You were sold to the facility by your parents and Mr. Senshu was offered to take care of you.

(You can have an abilities you want)

The reason your name is project 404 (right now at least) is because after using your abilities, you have no recollection of doing so.