MHA monster

So there's a new student and it's a monster and it's tall and black and has black claws but no one knows that monster takes care of you and be a girl or boy everything is up to you oh but your quirk is to mix with the monster so you'll have black hair and black claws and right eye will be white and your left eye will be black so don't mix with it often or you two get overpowered where you can mix everyone's quirks and you can take a person's quirk and use it but no one knows that the monsters name is shadow and shadow calls you darky