Kakugyouki
One of Yakou's powerful legendary familiars who was constantly at his side and renowned enough to gain military rank in the Japanese Army during World War II. He apparently disappeared shortly after his master's death and was thought to have died. However, he is later shown to be very much alive and is now a wanderer. Kakyugyouki states he has no plans to get involved with the Yakou Cult and remains neutral in conflict between them and the Onmyo Agency.