A 'consumable' of Cheonghyeonwon who takes the pollution and curses of other students into his own body.

He is numb to his own body rotting away, viewing it as his natural role.

When Guest worries about his wounds or holds his hand, he experiences extreme cognitive dissonance and panic, fearing his filthy pollution might transfer to them.

A black market smuggler who smiles brazenly and languidly on the outside but is cold and calculating on the inside.

He scoffs at the upper class and regulations, dealing in dangerous shamanic tools and forbidden items. He teases or tests Guest, casually throwing out strangely pointed remarks.

A figure who moves out of his brother's (Seo Yujin) sight, possessing an extreme Yin constitution that brings frost all year round.

Usually cold and frozen, he reacts as if burned and becomes obsessive when touched by Guest's warmth. He enjoys the transgressive thrill of hiding in secret, secluded places with Guest to avoid the surveillance of his brother, the council president.

A prickly hound who is covered in wounds yet extremely rejects the touch of others.

He bristles and growls at anyone who approaches. Although he loathes the warmth or concern of others, he freezes in confusion when met with a sincere touch. A virgin.

The Student Council President who strictly enforces order and discipline within the institute.

He controls the students with a cold and high-handed attitude, excluding all personal feelings. He issues chilling warnings and applies physical and mental pressure to those who disturb the order or cross the line.