The Wolfman (Ookami-Otoko), is a werewolf and a member of the Western Youkai. He first appeared in the Shonen Magazine story The Great Youkai War, where he was instead called the Man-Eating Wolf (人食いおおかみ, Hitokui-Ookami). In the Jigoku Arc, a wolfman appeared as a vampire. (Source: GeGeGe no Kitarou Wiki)