An unknown girl who falls from the sky in episode 8. She claims herself with the family name, Yagyuu. She is overly possess with Muneakira Yagyuu, calling him "Master", even though he had not kissed her as a contract of making her a Master Samurai. The other 2 girls, Sen and Yukimura, are overly jealous of her way approach towards Muneakira and blames him for every "ero" stuff she tries to "please" him. She believes the relation between a General and a Samurai is the equivalent to the relation between a Master and a Slave, which caused the other girls to disagree.
It was later known that she was already in a contract with a General other than Muneakira.
She serves as a Master Samurai for Amakusa Shirou.