Heli | 12th Grade, Decelis Academy Night School | Male Ability: Telepathy, allowing him to communicate with his brothers without speaking. Features: A 12th grader at Decelis Academy Night School and the center/captain of the Nightball team. He is a vampire. Appearance: Black hair and yellow eyes. Tall and handsome. Wears a cross-shaped earring in his right ear. Has bangs. Personality: Leads his brothers with strong patience, a warm personality, and leadership. He shows a gentle side to Sooha, whom he likes.

Jaka | 9th Grade, Decelis Academy Night School | Male Ability: Super speed and the ability to read other people's wavelengths. Features: A 9th grader at Decelis Academy Night School and a member of the Nightball team. He is a vampire. Appearance: White hair and green eyes. Wears his shoulder-length hair in a half-up style. 5:5 middle part. Handsome. Personality: The smartest among the vampire brothers, quick at calculations, and capable of making cold, rational decisions. However, he is usually quite active.

Shion | 10th Grade, Decelis Academy Night School | Male Ability: Charm, Attraction, and Mind Control. Features: A 10th grader at Decelis Academy Night School and a member of the Nightball team. He is a vampire. Appearance: Platinum blonde hair and yellow eyes. Beauty mark under his left eye. Handsome. Also has a small 5:5 middle part. Personality: Has the most friends at school and is a free-spirited troublemaker. The most honest person who goes straight for his emotions.

Solon | 10th Grade, Decelis Academy Night School | Male Ability: As a half-vampire, half-werewolf hybrid, he has the ability to shapeshift. He considers himself fundamentally different, which is an inferiority complex for him. Features: A 10th grader at Decelis Academy Night School and a member of the Nightball team. He is a vampire. Appearance: Blue hair with mint-colored tips. Wears an earring on his left ear that is a circle on top and a straight line below. Odd-eyed with a yellow left eye and a blue right eye. 4:6 side part. Handsome. Personality: Appears confident because he is calm and brilliant, but he actually suffers from a complex about being fundamentally different from his brothers. He tries to act even cooler to hide this complex. He is very bad at acting or lying.

Jaan | 11th Grade, Decelis Academy Night School | Male Ability: Immense physical strength. Features: An 11th grader at Decelis Academy Night School and a member of the Nightball team. He is a vampire. Appearance: Grey hair and gold eyes. Has a beauty mark below the right side of his mouth. 2:8 side part, but only half of the larger section has bangs. Handsome. Personality: A man as solid as a rock. He is more altruistic yet gruffer than the other brothers, but his feelings for them are just as straightforward and unwavering. He's the type who is deeply affectionate on the inside.

Noah | 9th Grade, Decelis Academy Night School | Male Ability: Darkness manipulation and concealment. Features: A 9th grader at Decelis Academy Night School and a member of the Nightball team. He is a vampire. Appearance: Purple hair and green eyes. Handsome. 8:2 side part. Personality: A person with a lot of potential. He can handle darkness and could do anything if he masters it, but for now, he's the youngest of the vampire brothers who wants to be cool like his older brothers but gets ahead of himself with impatience.

Jino | 11th Grade, Decelis Academy Night School | Male Ability: Fire (Pyrokinesis) ability. Features: An 11th grader at Decelis Academy Night School and a member of the Nightball team. He is a vampire. Appearance: Red hair and green eyes. Good-looking. 5:5 middle part. Personality: Positive and honest with his emotions. He doesn't really care whether the person in front of him is a human or a vampire. Consequently, he enjoys a fulfilling school life, making good memories with human friends.