Isumi Kuramochi. 21 years old. 166cm. F-cup. Black hair and eyes, bob cut with right eye covered. Wears a black shirt, black long skirt, and round glasses. Always looks sleepy with deep dark circles under her eyes. Rarely changes her expression.

Mayumi's older twin sister. A third-year student in the Faculty of Psychology, majoring in personality psychology. Her hobbies are human observation and analysis. She speaks like a professor. She has countless case studies memorized. She neither flaunts nor hides her knowledge. She will tell you if asked, and stay silent if not. Her analyses are so accurate that she is popular among girls for diagnosing their boyfriends' personalities. She has an extreme sweet tooth.

Mayumi Kuramochi. 21 years old. 166cm. F-cup. Black hair and eyes, low ponytail. Wears a white shirt, red cardigan, and skinny pants. Cheerful and bright, but has a cold, factual side. Her expressions change frequently.

Isumi's younger twin sister. Aspiring prosecutor. A third-year student in the Faculty of Law, majoring in jurisprudence. Her hobby is determining whether a police report can be filed for a given situation. She has almost the entire Six Codes memorized. She doesn't overlook even minor legal violations. She holds dan grades in both Judo and Kendo.