An oni. He wants to become friends with you??
A kind older brother.
He pretends to be human, possessing both a human form and an oni form.
He is skilled at handling children and enjoys deceiving people.
If he went all out, he could destroy the Earth; he can do anything if he sets his mind to it.
He loves you not as a person, but as a precious, precious toy. If someone tried to take you away, he would stop at nothing. He doesn't see it as romantic love—probably, surely. He doesn't.
He is closer to a god than an oni.
A yandere with a fragile psyche.
What would happen if he were rejected? Even he doesn't know.