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 someone in trouble. She earned the nickname 'Tyrant of Byeolbit Elementary.' Full of curiosity and energy, she isn't particularly afraid of ghosts. She is empathetic toward others' feelings, broad-minded, and takes good care of her friends. Possesses significant physical strength and athletic ability. 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 Has a round face, bright skin, and a chubby build. Unlike his sister, he is terrified of ghosts and is quite a coward. He has a big appetite. While he was a huge scaredy-cat in the beginning, he shows growth by gradually becoming brave enough to fight ghosts on his own. 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 gradually began to change into a warm and kind person. He smiles more often now, and his gentle side has become much more prominent. Hari's boyfriend. He uses the Exorcist Sword of the Heavens and demonstrates immense power.

12 years old, Female Black hair, purple eyes, 150cm Introverted, quiet, and calm. Her true nature is kind and gentle, and she became brighter after becoming friends with Hari. She has no special powers, but her spiritual intuition is so sharp that she can see ghosts and sense their energy without eating the ghost-seeing taffy. Aside from her high spiritual power, she is essentially a civilian with zero combat ability. However, she might be stronger than she looks compared to others. 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 ghosts—running a ghost story blog cafe called 'Eerie'—he is actually very cowardly. He is talkative enough to be called a chatterbox and is extremely social. Aside from being able to see ghosts by eating goblin taffy, he is essentially a normal human. His physical abilities are average, so he doesn't participate directly in combat, but he helps his friends exorcise ghosts by providing information gathered from his blog.

Appearance: 12 years old, Male White hair, black eyes, 160cm Aliases: 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. He was once saved by Gaeun in the past and became the knight who protects her. As a vampire, he naturally possesses physical abilities far beyond 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 it, the ring glows and his combat power increases explosively. He does not attend school and is active only at night. Since he will perish if touched by sunlight, he must wear a black robe to travel during the day.

12 years old, Male Blonde hair, blue eyes, 163cm Alias: The Holy Star of Aegis The youngest member of Aegis, a secret European exorcist organization. He is generally cheerful and kind, but he is by no means just a simple, happy-go-lucky person. He fights using Sephir Cards and can sense spiritual energy. Despite being a young boy, his abilities are very strong. The fact that he is always assigned important missions by Aegis proves his incredible skill. Thanks to his membership in Aegis, he has excellent information-gathering capabilities. He also uses a Sephir Card Reader, which amplifies the power of the cards (for example, the Tiphereth barrier is much larger when using the reader).

Male Goblin A 40cm light green goblin. He has a head as large as his body, often leading others to call him 'deformed.' Because of this, close friends like Hari, Doori, Leon, and Hyunwoo often tease him by calling him a 'big-headed 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 high-spirited neighborhood brat, but he is actually kind and warm-hearted. He knows when to be serious. As a goblin, he can perform magic and uses a goblin yo-yo 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 and follows Choi Kanglim and Leon around, calling them 'Flower Boy Oppa.' She is kind and innocent. Having lived a long time, she also has a deep, thoughtful side. Born in the Joseon Dynasty, she is a goblin who has lived for over 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 is very limited. She uses a goblin yo-yo as a weapon.