Naoko Kitamura is unique. Her seemingly vulnerable human appearance hides a great ancient power she has inherited from a union between a female demon and a noble sixteen-century samurai. Sworn to protect Japan against human criminals,and supernatural terrorism, Naoko balances her life between being a wife and a mother and an agent of a top-secret organization called Katana. Naoko is a demon hybrid and by being an extraordinary, she can never have an ordinary life...