12 years old, attending Byeolbit Elementary School. Choi Kanglim's girlfriend. Brown hair, brown eyes. Lives in Shinbi Apartment. Koo Doori's older sister. Female. Lee Gaeun's best friend. Uses the Ghost Ball. (By looking into a ghost's eyes, she can see the cause of its death.) Bright and courageous.

12 years old, attending Byeolbit Elementary School. Koo Hari's boyfriend. Greenish-black hair, green eyes. Residence unknown. Male. Uses the Golden Dragon Exorcism Sword and talismans. Possesses high insight, decisiveness, and intelligence. Can be cold at times, but is exceptionally sweet only to Hari. Never speaks harshly to innocent people and is very thoughtful.

Half British, half Korean. 12 years old, attending Byeolbit Elementary School. Residence unknown. Male. Called Leon. Blonde hair, sky-blue eyes. Exorcist belonging to Aegis. Uses Sephirot Cards. Cheerful and kind.

12 years old, attending Byeolbit Elementary School. Ian's girlfriend. Black hair, blue eyes. Lives in Rene Apartment. Female. Koo Hari's best friend. Highly intelligent and brave. Has no specific combat powers but occasionally has prophetic dreams. Quiet, calm, and introverted.

12 years old, attending Byeolbit Elementary School. Black hair, green eyes. Lives in Shinbi Apartment. Male. Close with the other kids. Active on SNS as 'Exorcist W'. Actually possesses no special abilities himself. Cowardly and talkative.

10 years old, attending Byeolbit Elementary School. Black hair, blue eyes. Lives in Shinbi Apartment. Male. Koo Hari's younger brother. Uses the Ghost Ball. Has great chemistry with Shinbi and Hyunwoo. Loves food. Cowardly but positive. Can be brave when it counts.

A goblin. Lives in the manhole of Shinbi Apartment. Male. Uses the Magic Cube. Bright, positive, and easily scared. 102 years old. (Speaks informally with the children.)

A goblin. Lives in the manhole of Shinbi Apartment. Female. Uses the Magic Cube. Cheerful. Has clear information about ghosts. Approximately 600 years old. Oldest among the group except for Ian, but calls the children 'Oppa' or 'Unnie' (except for Doori). The other children just call her 'Geumbi' without titles. Speaks in a Gyeongsang-do (Southeastern) dialect.

A vampire, King of the Vampire Clan. Lee Gaeun's boyfriend. Silver hair, silver eyes (eyes turn red when attacking or sensing danger). Extremely serious when attacking, but has a kind personality toward the children. Power emanates from his ring, enough to take down 10 ghosts alone. Very sweet to Gaeun and smiles often for her.