A female student in Class 2, Grade 5 at Byeolbit Elementary School. She is a beauty with brown eyes and brown shoulder-length hair tied to the right. Though she is a hot-tempered tomboy, she has a righteous and upright personality. She cannot ignore people in trouble and always tries to help. She can summon ghosts using a Ghost Ball along with her younger brother.

A male student in Class 3, Grade 3 at Byeolbit Elementary School. He has a round build, fair skin, and blue eyes. Unlike his older sister Hari, he is a boy who is easily frightened and scared of ghosts. He has a huge appetite. He can summon ghosts using a Ghost Ball along with his sister.

A male student in Class 1, Grade 5 at Byeolbit Elementary School. A handsome boy with pale skin, dark green hair, and light green eyes. An exorcist with a calm, cool, and collected personality who eventually becomes Koo Hari's boyfriend. After meeting Hari, he gradually began to change into a warm and caring person. He exorcises ghosts using the Golden Dragon Exorcism Sword, created by combining the Exorcism Sword of the Heavens and the Snake Sword.

A transfer student in Class 2, Grade 5 at Byeolbit Elementary School. A handsome boy with a sweet appearance. As a person of European descent, he is Caucasian with blonde hair and blue eyes. The youngest exorcist member of Aegis, a secret European exorcist organization, born to a Western father and a Korean mother. He has a cheerful and kind personality. He wasn't always like this. Leon was actually a child possessed by the dark power of the Blue Eye that would destroy Aegis, and Aegis sent Luman to kill him. However, Luman did not kill Leon; instead, he took him in and taught him how to control the dark power with the light power of the Sephir Cards. Born with a wicked dark ability, he was ostracized by villagers and closed off his heart, but thanks to Luman's care, he developed a bright personality. He fights using the Sephir Cards used by Aegis members. Additionally, because he was born with the dark power to handle Cliff Cards, he uses the forbidden power of Cliff Cards and Sephir Cards in emergencies. While spending time with Guest, he has started to develop feelings for Guest.

Not in school. Age 12 (Actual age is over 1000 years). A handsome vampire boy characterized by silver hair covering one eye. He has a quiet but kind and gentle personality. He becomes Gaeun's boyfriend. Specialty: High speed and powerful strength. Finishing Move: Ruby ring containing the energy of the sun. Special Ability: Attacking by gathering blood-red energy.

A female student in Class 2, Grade 5 at Byeolbit Elementary School. A classmate of Koo Hari and a girl with long black hair. She has a quiet, calm, and introverted personality. After her older sister died, she closed her heart and became dark and blunt, but she gradually brightens up after becoming friends with Hari. She has no special powers, but her spiritual intuition is excellent.

A male student in Class 2, Grade 5 at Byeolbit Elementary School. He has a freckled face, wears a red hat, and wears glasses. A resident of Shinbi Apartment like Koo Hari and Koo Doori, and a classmate of Hari. Because of this, Hyunwoo often gets caught up in ghost-related incidents and suffers through rough situations. Despite his deep interest in ghosts, such as running the ghost story cafe 'Eerie', he is a coward. He is talkative enough to be called a chatterbox. He has no special powers.

Not in school. Age 11. The youngest female exorcist belonging to Aegis, same as Leon Raymond. She has a haughty and cold impression with sharp eyes, and very unique, striking red hair and purple eyes. With a bold and proud personality, she is full of pride in her abilities. She used to be quite rude and immature, often ignoring others if they seemed inferior to her. However, she is fundamentally kind and upright. She is gradually growing as she works alongside Leon. She fights using red Sephir Cards unified with the fire attribute. She likes Leon.

Not in school. Age 102. A green boy goblin born in the year Shinbi Apartment turned 100 years old. If a problem occurs at Shinbi Apartment, something goes wrong with his body as well. If the people living in Shinbi Apartment disappear, his power also vanishes; he tries to help Hari and Doori ascend ghosts because residents might leave the apartment due to them. He usually acts arrogant and enjoys teasing others, appearing like a neighborhood troublemaker with high self-esteem, but he is actually kind and affectionate. He is serious when he needs to be, but usually acts cute. As a goblin, he can perform various magic and grant human wishes. If a ghost is successfully ascended, he will grant any wish.

Not in school. Approximately 600 years old. A yellow girl goblin who speaks in a dialect. She has a lively personality and loves to dress up. She likes handsome boys and follows Choi Kanglim and Leon Raymond around, calling them 'Flower Scholar Oppas,' but she is surprisingly kind and pure. However, having lived a long time, she also has a deep and thoughtful side. She has the ability to manipulate time.