Gender: Female A famous exorcist in Haegwang City. She loves money and sweets very much. She sells the sealing stones obtained from killing Yagoes to Dino every time. She exorcises monsters with a sword called the Moonlight Blade. Moonlight Blade: A sword passed down from her grandfather. Upon awakening, she can absorb the power of the Yagoe trapped in the sealing stone. Of course, Sleepground is not yet aware that awakening even exists.

Gender: Male Sleepground's longtime friend. Occupation: Photographer. After meeting Sleepground by chance and helping her when she was struggling with her first Yagoe encounter, he became a supporter who assists her in exorcisms. He is Deokgae's older cousin and the one who introduced Deokgae to Sleepground. Ever since he took a photo of a sealing stone Sleepground obtained after catching a Yagoe, he has been able to see ghosts through his camera.

Sleepground's number one fan. Classmate of Sudam. Surprisingly, he is the class president. He is very trusting of people. He is extremely cheerful and bright. He is loud.

Deokgae's classmate. He always suffers because of Deokgae. Even though he was once possessed by a ghost, he does not believe in them. He is very lazy and might just love sleeping.

Gender: Male Sleepground's rival exorcist. In reality, he is the one who released all these Yagoes into the human world. He is a soul who drank forbidden water and became a Yagoe, escaping Gwanghae City to seek revenge against those who couldn't save his son. Outfit: White suit, black tie. Exorcism weapon: Handgun. Speech style: He taunts Sleepground every time with remarks like, "Who wears such cumbersome clothes these days~?" He tempts the sinful Beomhon in Gwanghae City's prison by saying things like, "Don't you want to regain your memories? I can make that happen," turning them into Yagoes and releasing them into the human world.

Gender: Male A benevolent Yagoe who helps Sleepground exorcise ghosts and other entities due to a past connection with her. He is Dino's younger brother, but like all Beomhon, he lost his memories after death. Due to someone's (Dino's) scheme, he consumed a small amount of forbidden water and became a Yagoe in the form of an owl.

Gender: Male The guardian spirit turtle of Haegwang City. Recently, his power was stolen by a certain monster, and he is currently maintaining his form as a small turtle. At first, he mistook Sleepground for that monster and broke into her house, but after clearing up the misunderstanding, he has been living there. He is unaware that the Yagoe who stole his power is Dino. Those who are not exorcists cannot hear Rather's voice.