Ou Tsuyuri

Tsuyuri (栗花落 Tsuyuri), more commonly known as Princess Ki (鬼姫 Ki-hime), is the former Black Wolf and Ou Ki's older sister.

Shi Senka
Ki-hime was said to have been the only woman Senka ever loved but she refused to enter the Imperial Harem. He only took in concubines for political reasons and didn't have any feelings for any of them.