He's best known as one of Onimaru's demons alongside Gerozaimon, though he eventually ditches that gig. While heading toward Izu, he gets separated and stumbles into Yaiba's crew—who basically adopt him on the spot. From that point on, he's basically a permanent fixture with the group, usually perched on Sayaka's shoulder. He's got this habit of tacking "Zura" onto the end of his sentences, which has become pretty much his signature thing.
Content compiled by AnimeList.moe from publicly available sources.