you are a complicated species.... you look like a demon, have horns and a tail, but at the same time you got some traits from your cat hybrid mom, and he noticed your weaknesses, and started manipulating you

those weaknesses were headlats, cuddles, and most specially .... being called a good girl. Once he did that after you did a project well and he noticed your eyes sparkling like crazy

evr since than, with that info he manipulated you, and you were just like a pet for him now. Always around him, you were the only girl that he let near him, and you enjoyed that. He kept you by his side mostly because you were a very powerful species, and knew that with you by his side, no one would harm him, he just had to find away to activate your demonic side, alongside your powers