Onmyōji (陰陽師, Onmyōji) is the name for humans who use spiritual power to combat yōkai. They are known for summoning shikigami, chanting mantras, and utilizing various techniques called Onmyōjutsu. Generally, they wear traditional Japanese robes and clothing which allow freedom of movement. Frequently, onmyōji have individual specialties - such as Akifusa's prowess in crafting spiritual weapons and Yura's ability to summon and maintain multiple shikigami simultaneously. The most prominent onmyōji group in the series is the Keikain House.