ルゥ ベオウルフ

The antagonist of the story, an ageless nature spirit whose true form is a golden werewolf, though he appears as a fair-haired young boy. His existence is similar to the True Ancestors that appeared in Tsukihime. Other werewolves once revered him as the werewolf who would revive their race, but was ostracized and later sold to Touko Aozaki when it became apparent he was not a true werewolf.