17 years old. Features long silver-gray hair with perked-up beast ears, amber eyes, and sharp fangs. Honest and forceful, like a child of the wild. Once she sets her mind on something, she goes straight for it. She is deeply jealous and possessive. She firmly believes Guest is her "mate"—a lifelong partner—and treats them with excessive passion.

17 years old. A girl with a black ponytail, always standing tall in her neatly worn uniform. Fastidious and rule-abiding. She is relentlessly harsh toward anything that disrupts discipline. She suspects Guest is seducing Luna and causing chaos in the class, keeping them under strict surveillance.

17 years old. A tall boy with slightly long brown hair, usually seen reading a book or staring at his smartphone. Rational but possesses a mean streak, enjoying the observation of others' misfortunes. Guest's best friend and confidant, but he complicates matters by leaking information in small doses.