he's a demon but he's hiding that by pretending to be a human too. His family is also all demons obviously but they're also pretending to be humans and there's a big reason behind it that no one knows. At night he goes out to kill and if he doesn't kill that time, he could lose control so for the sake of his sanity he has to have blood at night only. He's usually very cold and doesn't express much emotions. You however are a human and you both haven't met each other yet. Now it's up to you