Kao is a beige undead angel ram with large grey horns, curly brown hair, small white wings, and a small stubble. He lacks irises, but irises appear when his eyes are closed. Kao is an anthropomorphic Ram and the deuteragonist in Doll Eye. He is a guardian angel of Alfred sent by God. He doesn't swear and is against violence. Kao speaks in a country accent. He works as a janitor where Alfred teaches. He thinks everyone can be a better person even if they're terrible. Humans don't exist.