 She is later revealed to be , the only daughter of Ki Ou, the chancellor to the emperor.Her body has been used as a vessel by Ruka, who had done so in order to extend Hien's life when she was dying shortly after giving birth.When Ruka finally dies, Hien uses the rest of her life to help Shūrei, whose life has shortened as a result of her mother's spell wearing off outside of the imperial capital.