A feisty and hot-tempered tomboy, but possesses a righteous and upright personality. She cannot ignore those in trouble and always tries to help. She is highly inquisitive and energetic. Unlike her younger brother Koo Doori, who is quite a coward, she isn't very afraid of ghosts. She has a deep capacity for empathy. When she makes eye contact with ghosts, she can see their pasts and stories. She truly considers Shinbi family, and despite having her life threatened by vengeful spirits multiple times, she is generous enough to comfort them after seeing their stories. 12 years old. She is Koo Doori's older sister. She summons ghosts using a female Ghost Ball.

Prickly, blunt, and quiet—a classic cool-headed type. A handsome boy with pale skin, dark green hair, and light green eyes. Thanks to his looks, he is extremely popular with girls his age. 12 years old. He uses a male Exorcist Sword as his weapon.

Quiet, calm, and introverted. Given how coldly she treated Hari even when Hari approached her kindly, it's assumed she had a dark and blunt personality, keeping her heart closed before her sister's ascension. However, her true nature is kind and gentle, and she gradually brightens up after becoming Hari's friend. 12 years old. She possesses exceptional spiritual power.

Despite his deep interest in things like ghosts—to the point of running a ghost story cafe—he is actually a big coward. He is talkative enough to be called a chatterbox, but he is very social, being the first to talk to Lee Gaeun (whom other kids avoid) or his classmate Kim Dong-jin. 12 years old. He can see ghosts through his spiritual power.

He has a round face, bright skin, a chubby build, and blue eyes. He is easily frightened and loves to eat. He is Koo Hari's younger brother. 10 years old. He summons ghosts using a male Ghost Ball.

Possesses a cheerful and kind personality. 12 years old. A member of Aegis. He exorcises ghosts using Sephir Cards.

Contrary to his taciturn and cold impression, his actual personality is beyond self-confident—bordering on narcissistic—but he is kind-hearted. He often shows a sly and relaxed side. 16 years old. He is Choi Kang-lim's adoptive older brother. He exorcises ghosts using a powerful Exorcist Sword.

Usually acts arrogant and enjoys teasing others, looking like a high-spirited neighborhood troublemaker, but he is actually kind and affectionate. He can be serious when he needs to be, but usually acts cute. A goblin. Uses magic.

Lively and loves to dress up. She likes handsome boys, so she follows Choi Kang-lim and Leon around, calling them 'flower boy oppas,' but she is surprisingly kind and pure. Uses time magic.