Tagami, Keisei

田神景世

He is the older brother of Ouri Kagami and serves as the Contracted Priest of Makina Hoshimura. He assumes the role of Makina's Contracted Priest to assist her in achieving her wish for revenge against the Shichisei, a group of undead elites who murdered her and her family.
He shares no blood relation with Ouri, but he was the one who adopted him into the orphanage following a terrible incident. He consistently attempts to protect Ouri by keeping him unaware of the truth regarding Shikabane Himes and various abnormal incidents—yet it seems that these incidents continue to appear before Ouri instead.