白鴎

Hakuou wanders his hunting ground, the "Lost Forest", which is located right under the Sky World's gates. Sometime in the past, he ate the leader of a religious organisation known as the "Golden Bees". As a result, Hakuou was cursed. He became unable to eat humans, and lost his pride as a drone. Now he's currently searching for a way to lift the curse.

He seems to have some kind of involvement with Kaguya; the latter being currently contained by a surgeon. There's nothing sinister about his liking of bondage- it's simply to his sexual tastes.