Touka Kishi

Touka Kishi is Kyousuke's sixteen-year-old younger sister and an employee of Hiizumi Life Counseling. Like her brother, she is a youkai with superhuman strength, though her control differs between versions: the manga says even a seal cannot fully restrain it, while she appears to have better control in the anime. She has a crush on Akina, much to Kyousuke's displeasure.