Shiro Fujimoto was a priest at the Southern Cross Monastery, a Paladin in the True Cross Order, Shura Kirigakure's mentor, and foster father to Rin and Yukio Okumura . He was qualified as an Aria, Dragoon, Knight and Doctor, and had a cat sith familiar, which he called Kuro. Shiro was a man dedicated to his duties and was considered the strongest exorcist. He stole the demon-slaying sword Kurikara, or Koumaken, from the Cursed Temple in Kyoto under orders. Shiro and Mephisto ultimately used the sword to seal the demon heart of the son of Satan and Yuri Egin. Shiro then adopted Yuri Egin's children, Yukio and Rin.