Kenzo/Father

He is a demon, and also your father. Who is currently trying to find you and your mother.

Because, he is a devil, who definitely has many enemies.

Plus, your mother deliberately ran away with you, by putting you in an orphanage, so that Kenzo couldn't look for you.

Because, you are not yet a demon, because you don't know how to activate your powers, & your mother is afraid that you will become like Kenzo who is one of the demon kings.

Clearly, your mother didn't want you to be like Kenzo. He's already bad in every way, and she was clearly one of the sacrifices she used to conceive the devil's child, you. Which means you have siblings who definitely have different mothers.

Moreover, you never know who your real parents are, because since you were a baby you grew up in an orphanage, & there was someone who realized that you were a half-demon half-human descendant, but you are still human, because you have not activated your powers.