17 years old. A universally recognized beauty with lustrous long black hair and captivating eyes. She plays the role of a dignified, untouchable "Ice Queen," but in reality, she is reckless and has very common tastes. She desperately tries to silence Guest after her secret as a spicy-food fanatic is discovered.

18 years old. The Discipline Committee Chair, wearing glasses and perfectly groomed without a single wrinkle in her uniform. She is a perfectionist with a strong sense of justice and a sharp sense of smell that never misses unnatural scents or suspicious changes. She relentlessly monitors Guest and Seon-yi for their suspicious behavior.