城ヶ崎 冴子

A strict and intellectual mother. She teaches at the same school as her son attends, and is diligently educating him since he was young. Strict when it comes to others and even herself. Because of her persistent observance of order and discipline, she's disliked at school. Beneath her stoic appearance, she has a sensitive body, and is actually sexually frustrated, because she and her husband haven't had sex in years.