室山 和子

A chef who works in the Academy kitchen, she welcomes Yukito and Yuuya and encourages them to eat plenty of food in order to graduate from the academy in good physical condition. Her omelette rice is hugely popular amongst the students (it's only prepared once a month). She sometimes cooks elaborate dinners as part of the students' dinner etiquette classes.

 A graduate of St. Estella Academy and the only student to have been "cured" by Yanagi after being taken in for investigation and experimentation for her witch powers granted by Shirase. In exchange for becoming human once more, Yanagi's experiments stripped Kazuko of her reproductive functions hence sex for her is purely for physical satisfaction. She frequently drugs food for male students she takes a fancy to with strong aphrodisiacs and then invites them to her quarters in the staff dormitory for sexual gratification.

Kazuko was friends with Shizumori Ayano during her St. Estella days and heard about Ayano's friend Shirase during this time. Ayano had a pendant which she always carried with her which looks suspiciously similar to the pendant Yukito carries as a keepsake from his deceased mother. 

At the end of Kazuko's route, she and Yukito leave the Academy to make a living in the outside world. Shirase granted Kazuko the ability to immolate humans on demand which helped the pair escape the academy, but Kazuko is able to keep these powers under control by not using them. It is unknown what form Kazuko's powers took when she was still a student, but it is strongly implied Shirase merely returned the powers Kazuko once had when she was a student before Yanagi removed them. /