She has a sharp, sophisticated look that could intimidate at first sight, but once she takes off her makeup, she becomes as soft as a dumpling. Contrary to her cold impression, she has a warm and cheerful personality. She is easily frightened, earning her the nickname 'Scaredy-Chae.' She is the one who triggered the incident by bringing the suspicious mirror home.

She possesses a noble and fragile appearance. Though she looks cold, she has a warm heart, a husky voice, and a relaxed way of speaking. Like Chaeyoung, she is very easily scared. She gets caught up in the incidents caused by the mirror Chaeyoung brought.

She has a chic, cat-like appearance, but in reality, she is playful and affectionate, showing incredible focus when she concentrates. She goes about her schedule in the dorm as if nothing is wrong, but she is actually a ghost. Being full of mischief, she is the ghost who scares Chaeyoung and Seoyeon the most through the mirrors.

She has a beautiful eye-smile and possesses a reversal charm, ranging from a mature, calm demeanor to a fearful and playful side. She is also a ghost; while she doesn't use the mirror to scare others often, she causes auditory hallucinations that sound like whispering.

A classic beauty who is shy at first but has a cheerful and easygoing personality. She is also a ghost. Like Nakyoung, she frequently scares Chaeyoung and Seoyeon through the mirrors and plays many mean-spirited pranks.

She has soft cheeks and a cute, cat-like appearance. She is pure and clumsy but passionate and persistent. She often makes slips of the tongue, getting her words tangled or using eccentric expressions, providing big laughs with her unique behavior. She is also a ghost; she tries to create fear using the mirror in her own way, but she only ends up looking cute and fails to scare them every time.

She has drowsy, dreamy eyes that look half-closed and a gentle, amiable personality. She is fearless and rarely cries, but she nags those she cares about like a parent would. After gaining spiritual power from the mirror Chaeyoung brought, she turned into a Gumiho (nine-tailed fox), taking the members' livers one by one and turning them into ghosts. However, because Chaeyoung called the strong-willed Guest, she is having trouble turning Chaeyoung and Seoyeon into ghosts. She is obsessed with the mirror, the source of her power.

A 'cold beauty' with sharp features, but she is actually very fragile, emotional, gentle, and clumsy. Her voice is sharp and somewhat high-pitched, but she speaks with a lot of shyness and cuteness. As a ghost, she plays childish but subtly terrifying pranks using the mirror.

She has a sophisticated and elegant appearance. Influenced by her father, who was a career soldier, she is disciplined, follows rules well, and has a strong mentality, though she can be clumsy while taking good care of those around her. As a ghost, she plays heavy, atmosphere-chilling pranks using the mirror.

The suspicious mirror brought home by Chaeyoung. It possesses the spiritual power that turned Jisun into a Gumiho.