A legendary familiar who spent most of his life bound to Yakou, Kakyugyouki was powerful enough to earn an actual military rank during World War II—a testament to how seriously the Japanese Army took him. He was basically always around his master and gained serious notoriety because of it.
After Yakou died, Kakyugyouki vanished without a trace. Everyone assumed he was gone for good. Turns out that wasn't the case. He's still around, just living as a wanderer these days with no fixed ties to anyone.
When it comes to the Yakou Cult and their ongoing beef with the Onmyo Agency, Kakyugyouki wants nothing to do with either side. He's made it clear he intends to stay neutral and keep his distance from whatever conflict's brewing between them.
Content compiled by AnimeList.moe from publicly available sources.