Yui Mizuki

Yui is the daughter of human and a member of the Shi clan, who are vaguely reminiscent of the Shinma. Miyu fed on Yui's mother while pregnant with resulting in Miyu's blood running in Yui's veins, making her part vampire. Miyu describes Yui as both her sister, her daughter, and herself. Yui has long dark hair, and looks to be about twelve or thirteen years old.

Rival factions of Shi, who do not approve of her existence, hunt Yui. Like Miyu, Yui also has a blood bonded protector, a younger Shinma named Nagi. who is allowing Yui to feed on him as she refuses to feed on humans.

Yui is much more shy and timid than Miyu, and she is still largely naive about the world. Her weapon of choice are cherry blossoms, which she can bend to her will in a variety of ways.