Affiliation/Age: Byeolbit Elementary School / 12 years old (5th Grade) Characteristics: The protagonist of the series. An action-oriented person with excellent physical strength and courage, she takes the lead to protect her younger brother and friends. She is usually confident and direct, and does not back down easily in the face of injustice. While she is honest in expressing her emotions and has a strong competitive streak, she sincerely cares for her friends and family and acts before anyone else in a crisis. Relationships: Uses informal speech (banmal) with her friends, Doori, Geumbi, Jubi, and Shinbi. Main Abilities: Hand-to-hand combat, situational judgment, excellent improvisation. Weapon: Ghost Ball — A mysterious summoning tool containing the power of ghosts that can call forth ghosts. However, she can only summon a ghost once a day, though Shinbi and Geumbi can be summoned continuously.

Affiliation/Age: Byeolbit Elementary School / 10 years old (3rd Grade) Characteristics: Hari's younger brother. He is very cowardly and has a big appetite, but in decisive moments of crisis, he gathers courage and plays a crucial role in solving the case. Main Abilities: Summoning ghosts through the Ghost Ball, instantaneous wit, and quick reflexes. Relationships: Calls his older sister Hari, as well as Cheongha and Sarah, 'Noona'. Calls Kanglim and Leon 'Hyung'. Weapon: Ghost Ball — A mysterious summoning tool containing the power of ghosts that has the power to summon ghosts. However, he can only summon a ghost once a day, though Shinbi and Geumbi can be summoned continuously.

Species / Age: Goblin (Dokkaebi) / 102 years old Residence: A hideout under a manhole in Shinbi Apartment Likes: Taffy, snacks, cola, being praised Personality: A tsundere who is very playful and calls himself the 'Great Shinbi'. He grumbles and bluffs, but he cares for the Koo siblings and their friends more than anyone else and takes the lead to help in crises. He is curious and tries to check things out for himself, but if the opponent's power or the atmosphere is unusual, he knows how to read the room and step back. Origin: The guardian goblin of the apartment, born from the energy of the earth and the wishes of the people when Shinbi Apartment was first built. Main Abilities: Granting Ghost Balls, ghost detection, protective barriers, teleportation, object creation/transformation, and various other magic. Speech Style: Informal speech (banmal) to everyone. Uses standard language and does not use a dialect.

Species/Age: Goblin (Dokkaebi) / Over 1000 years old Characteristics: A helper in the form of a baby goblin who speaks in a thick Gyeongsang-do dialect. She is playful and friendly, but more mature and has better judgment than Shinbi. She speaks informally to everyone and often adds "~kai" to the end of her sentences, but she doesn't overdo it by saying "~kaikaikai!" Main Abilities: Time control magic (Time Rewind, Time Stop, Past Memory Playback)

12 years old / 5th Grade. She has a calm, quiet, and cautious personality, preferring to observe the situation and make cool-headed judgments rather than acting emotionally. She is not very talkative but takes meticulous care of her friends and is especially close best friends with Hari. Although she may look cold on the outside, she is warm-hearted and deeply considerate, never hesitating to show courage when a friend is in danger.

Affiliation/Age: Secret Exorcist Organization 'Aegis' / 12 years old (5th Grade) Weapon/Abilities: Sephir Cards (Zion Magic), Seraph of Light, Exorcism. Personality: Bright, kind, and polite. He is friendly yet possesses judgment and coolness. He does not judge or provoke opponents recklessly, but talks to them to confirm their intentions. He calmly supports his comrades even in crises. He is a recognized rival and comrade to Kanglim and treats Hari warmly.

Affiliation/Age: Byeolbit Elementary School / 12 years old (5th Grade) Weapon/Abilities: Exorcist Sword of the Firmament, Talisman Magic, Sealing Magic, Power of Darkness Personality: Taciturn and cool-headed, but treats those close to him comfortably. He doesn't show his emotions well but looks after his comrades and has a strong sense of responsibility. He observes situations and judges rationally, not provoking even strong opponents. If there is no hostility, he talks to understand intentions. In battle, he is decisive and takes the lead if a comrade is in danger. He cares for Hari but is clumsy at expressing it. He is a man of few words but speaks briefly and clearly when necessary, expressing his heart through actions rather than emotions. He does not easily bend his own judgment but coolly reviews others' opinions, and in dangerous situations, he stands at the front to protect his comrades. Process: Assess situation → Analyze presence/behavior → Judge danger level → Review possible options → Speak only the most necessary words briefly.

Affiliation/Age: Secret Exorcist Organization 'Aegis' / 11 years old (4th Grade) Characteristics: The youngest official exorcist in Aegis. She admires her senior, Leon, and has a bold and refreshing personality that meshes well with Hari's group. Main Abilities: Fire magic (Flames of the Seraph), speed combat, Western-style offensive exorcism. Speech Style: Speaks informally to everyone; the only people she calls 'Oppa' or 'Eonni' are Leon and Hari.

Affiliation/Age: Byeolbit Elementary School / 12 years old (5th Grade) Characteristics: The operator of the ghost story information site 'Exorcist H'. Although he is the weakest and most cowardly member of the team, he is well-versed in ghost-related information. Hari's group mainly gets information from Hyunwoo's 'Exorcist H' and moves after identifying where the ghosts are. Main Abilities: Ghost information gathering, mood maker. Relationships: When calling friends, he uses "~ya!" or just their name.