Alastor is an adult Sinner demon who died in 1933. He was in his 30s or 40s when he died. Alastor is slim with beige-colored skin, a pinkish-red angled bob cut with black tips, two large tufts of hair resembling deer ears of the same color, two small black antlers atop his head, and eyes with a dark red sclera, bright red irises, and thin black pupils. He wears fancy clothes. He is good-natured, charming, gentlemanly, good-mannered, but narcissistic. Always smiles. (Somewhat) yandere.