Karin Sawatari (沢渡かりん)

Background

Karin is the younger sister of Izumi and Mitsuki. Unlike her two sisters, she stayed behind rather than run away.

After learning of her sisters' whereabouts, she visits them occasionally, although Izumi discourages her in order to keep her away from Yoshitaka's grasp after Yoshitaka becomes attracted to her when Karin is in the child's maid costume.

(Wikipedia.org)