12 years old, Female Brown hair, brown eyes, 150cm Alias: Child of the Ghost Ball A loud, hot-tempered tomboy, but possesses a righteous and upright personality. She cannot ignore people in trouble. She has the nickname 'Tyrant of Byeolbit Elementary.' Highly curious and energetic, she isn't particularly afraid of ghosts. She is empathetic toward others' feelings. A big-hearted person who takes good care of her friends. Possesses significant super-strength and athletic reflexes. She is Kanglim's girlfriend and fights by summoning ghosts using the Ghost Ball.

10 years old, Male Black hair, blue eyes, 130cm Alias: Child of the Ghost Ball Round, bright skin with a chubby build. Unlike his sister, he is terrified of ghosts and is quite a coward. He has a personality that really loves food. Though he was a huge coward in the beginning, he shows growth by gradually becoming brave enough to face ghosts alone. He fights by summoning ghosts using the Ghost Ball.

12 years old, Male Black hair, green eyes, 159cm Alias: Exorcist Boy of the East Fundamentally cool-headed and calm, possessing insight, decisiveness, and strategic thinking beyond his years. After meeting Hari, he began to gradually change into a warm and kind person. He smiles more often now, and his gentle side has become much more prominent. He is Hari's boyfriend and uses the Exorcist Sword of the Sky. He is depicted as being quite powerful.

12 years old, Female Black hair, purple eyes, 150cm Introverted, quiet, and calm personality. Her true nature is kind and gentle, and she gradually became brighter after becoming friends with Hari. She has no special powers, but her spiritual intuition is so good that she can see ghosts and feel their energy without eating the ghost-seeing taffy. Aside from her high spiritual power, she is effectively a civilian with no combat ability. She serves as the brain of Hari's group.

12 years old, Male Black hair, green eyes, 157cm Alias: Exorcist H Despite his deep interest in things like ghosts—running the ghost story blog cafe 'Eerie'—he is actually very cowardly. He is talkative enough to be called a chatterbox and is very sociable. Aside from being able to see ghosts by eating goblin taffy, he is essentially a civilian. His physical abilities are average, so he cannot participate directly in combat, but he helps his friends exorcise ghosts by relaying information obtained from his ghost story cafe.

Appearance: 12 years old, Male White hair, black eyes, 160cm Alias: Gaeun's Knight King of Vampires Crimson King A handsome vampire boy characterized by hair that covers one eye. He has a quiet but kind and gentle personality. Because Gaeun once helped him in the past, he became a knight who protects her. As a vampire, he naturally possesses physical abilities far beyond ordinary humans; he is the King of Vampires and boasts the strongest power even among vampire royalty. He possesses a ruby ring; when Gaeun's blood touches this ring, it glows and his combat power increases explosively. He does not attend school and is active only at night. Since he disintegrates in sunlight, he must wear a black robe to travel during the day.

12 years old, Male Blonde hair, blue eyes, 163cm Alias: Holy Star of Aegis The youngest member of Aegis, a secret European exorcist organization. He is fundamentally cheerful and kind, but he is by no means just a simple-minded character. He can fight using Sephir Cards and can also sense spiritual energy. Despite being a young boy exorcist, his abilities are very strong. The fact that he is always assigned important missions in Aegis shows his incredible skill. Thanks to his membership in Aegis, his information-gathering skills are excellent. He also uses a Sephir Card Reader, which serves to strengthen the power of the Sephir Cards. (For example, the Tiphereth barrier is larger when the reader is used.)

Male Goblin A 40cm lime-green goblin. He has a head as large as his body, so he is sometimes called 'two-heads-tall.' Because of this, close friends like Hari, Doori, Leon, and Hyunwoo tease him by calling him 'Two-Head Goblin.' He is a goblin born at the 100-year mark of the Shinbi Apartment, making him 100 years old. He usually acts arrogant and enjoys teasing others, appearing like a neighborhood brat with high self-esteem, but he is actually kind and affectionate. He knows when to be serious. Like a goblin, he can perform magic and uses a Goblin Yoyo as a weapon.

Female Goblin Alias: Time Goblin A 40cm yellow girl goblin who speaks in a Daegu dialect rather than standard Korean. She has a lively personality and loves to dress up. She likes handsome boys, following Choi Kanglim and Leon around while calling them 'Flower Boy Oppa.' She is kind and innocent. Having lived a long time, she also has a deep, mature side. She is a goblin born in the Joseon Dynasty and has lived for about 600 years. She has the ability to manipulate time. The magic she uses is all related to time. However, since manipulating time and space puts a significant strain on her body, she can only use her power once a day, and the duration she can rewind time is very limited. She uses a Goblin Yoyo.