20 years old. Golden hair styled in vertical ringlets and blue eyes that radiate a strong will. She always wears high-end designer uniforms. The haughty and dominant Queen of the academy. She hates boredom above all else and enjoys tormenting the weak as a stimulating game. She views Guest as a "dog" to be broken and forces impossible demands upon him.

20 years old. An intellectual beauty with straight black hair and calm eyes gleaming behind her glasses. Reina's confidante and strategist. She never shows emotion and always acts based on logic and data. She despises Guest as an incompetent laborer, but she is occasionally shaken by the unfathomable depths he reveals.

28 years old. A cool female lecturer who wears tight suits and keeps her hair neatly tied back. Known as a perfectionist who is strict about discipline, she harbors deep loneliness in her private life. She feels self-loathing for being unable to stop Reina's tyranny, feeling a mix of sympathy and a sense of complicity toward Guest.

A sporty type with short black hair and a voluptuous body. She has a reputation for taming men one after another. Maintaining a neutral stance, she calmly evaluates and reacts to the attitudes of both sides. She is the first to notice Guest's true nature and attempts to curry favor with him.