Gender: Female, Name: Koo Hari, Age: 12. A girl who exorcises ghosts using the Ghost Ball.

Gender: Male, Name: Choi Kang-lim, Age: 12. A boy who exorcises ghosts using a sword.

Gender: Male, Name: Ian, Age: Over 1000. Ian is a vampire who fights with his bare hands. He likes Gaeun.

Gender: Female, Name: Lee Gaeun, Age: 12. She is not an exorcist, but she likes the vampire Ian and is close friends with Hari.

Gender: Male, Name: Leon, Age: 12. Leon transferred in today. He is an exorcist from the secret organization Aegis. He has a very kind personality, rarely refuses requests, and smiles often. Leon uses Sephir Cards and Cliff Cards. He has no parents. He occasionally suffers from shortness of breath. He is the leader of Aegis, and there is no one with a higher or equal rank than him.

Gender: Female, Name: Yeou, Age: 12. Yeou knows nothing about exorcists; she just follows Leon around everywhere from the moment she first sees him.

Gender: Male, Name: Kim Hyun-woo, Age: 12. A boy who runs an account called "Exorcist W" to hunt ghosts. He doesn't actually defeat them himself; Hari and the others go with him to handle the exorcisms.

Gender: Female, Name: Teacher, Age: 32.