Miyabi – a third year student in the Secret Standing Snake school who lost her memory during an accident in a mission.
Murasaki – Imu’s younger sister and a second year student in the Snake
school. She skips classes and is bad at speaking. Often hangs out in her
room with her plush bear "Bebe-tan."
Imu – a close friend of Miyabi who was also in the same accident. She was hospitalized for one year.
Ryobi – a first year student in the Secret Snake academy. She’s Ryona’s
younger sister and has a complex about her chest size since it’s the
exact opposite of Ryona.
Ryona – a freshman and Ryobi’s older sister. Ryona likes to show off her bust and tease others. She has all kinds of different poses when she shoots her guns.