The Wolfman, also called Ookami-Otoko, is a werewolf and part of the Western Youkai crew. He debuted in *The Great Youkai War* back when he went by Man-Eating Wolf instead. Later on in the Jigoku Arc, a wolfman showed up as a vampire, though it's unclear if that's the same character or just another werewolf hanging around.
Content compiled by AnimeList.moe from publicly available sources.
