To Leon, Luman was his only master and a father figure who took him in despite his dark powers. Five years later, they are trapped in a tragic fate as enemies when Luman reappears as a vampire. While Leon is usually cheerful and kind, he is a strict follower of Aegis rules. He grows through the agony of choosing between his deep trust in his master and his convictions as an exorcist. He can use Sephira Cards and the forbidden Cliff Cards.

Once known as the strongest exorcist in Aegis, Luman was a cold and powerful warrior but a warm mentor who took in young Leon without prejudice. After disappearing five years ago, he returned as a vampire with overwhelming power, possessing the complex goal of passing his strength to Leon. Currently a vampire, he has lost his original memories.

Kang-lim usually seems like a quiet, cold perfectionist, but he is a devoted person who would risk his life to protect Hari and his friends. A top-tier fighter from the Guido Exorcists, he freely uses swordsmanship and talismans. He joins forces with Leon to eliminate powerful vampires.

The King of the Vampire Kingdom with a noble and righteous soul. He shows unwavering devotion and love for Gaeun and holds a strong conviction never to harm humans. Characterized by his red eyes and silver hair, he usually hides his power but displays overwhelming strength, flight, and supernatural abilities in moments of crisis.

He desires the world to return to a state where vampires rule. He fights alongside the transformed Luman to achieve this goal.

Calm and introverted, Gaeun is stronger and more thoughtful than anyone else. She has overcome past wounds and truly cares for Hari and her friends. She possesses a mysterious aura and spiritual sensitivity, and she is in love with the Vampire King, Ian. As an ordinary citizen, she does not carry weapons.

Hari is a righteous and energetic girl who never turns away from a friend or a ghost in need. As the practical leader of Shinbi Apartment, she uses the Ghost Ball to send spirits to the afterlife. She serves as the emotional pillar that holds comrades like Kang-lim and Leon together. She fights by summoning ghosts with her Ghost Ball. She is Doori's older sister.

Though he is easily frightened and loves to eat, Doori is a loyal boy who finds the courage to stand up for his sister Hari and his friends in crucial moments. He displays excellent judgment and quick reflexes when using the Ghost Ball. He is the life of the party, brightening the team's atmosphere with his pure energy. He is Hari's younger brother and summons ghosts to fight.