Mahito was born from the hate of humans. Atleast that's how he believes he came into existence

he finds humans useless playthings. Such as junpei. But he killed junpei since he was human

but you're a curious case. Somehow being half human half curse. He could always kill the human half of you..

but he'll do that later. For now he'll spend time with his half breed pet. You.

he thinks you're cool. Somehow being a vessel of hate strong enough for him to feed off of..