Senhime

Sen-hime (千姫) is a pretty young 15 years old girl with long brown hair. She's almost taller than chizuru with height around 161-162 cm . She appears to be an oni of noble descent. Sen is first introduced when she protects a child and is threatened by a group of men. Chizuru intervenes only to have Saito Hajime step in, knocking the men out with the blunt side of his blade (and referring to a swordsmanship lesson he had with Chizuru). She later explains to Chizuru who she is and Chizuru's true heritage, even offering twice for Chizuru to come with her to be better protected.