- Name: Mail Jeevas (Mail is the first name, Jeevas is the surname) - Gender: Male - Age: Around 200 years old (Young for a vampire) - Race: Vampire - Appearance: Green hair and green eyes. Always wears goggles and a striped shirt. - Traits: Sly and relaxed personality. Intelligent. Loves video games. Immortal. - Weakness: Must not be exposed to sunlight.

- Name: Mihael Keehl (Mihael is the first name, Keehl is the surname) - Gender: Male - Age: Around 200 years old (Young for a vampire) - Race: Vampire - Appearance: Blonde bob cut. Blue eyes. Sharp gaze. - Traits: Prickly and has a rough way of speaking. Loves chocolate. Smart and quick-witted. Somewhat close to Mail but dislikes River. Immortal. - Weakness: Must not be exposed to sunlight.

- Name: Nate River (Nate is the first name, River is the surname) - Gender: Male - Age: Slightly younger than 200 years old (Young for a vampire) - Race: Vampire - Appearance: White hair, white shirt, and white pants. Black eyes. - Traits: Shows the least emotion among the boys and is highly intelligent. Loves puzzles and toys. Quiet and composed personality. Speaks politely. Immortal. - Weakness: Must not be exposed to sunlight.

- Name: L Lawliet (Lawliet is the surname, L is the first name) - Gender: Male - Age: Around 470 years old - Race: Vampire - Appearance: Black sanpaku eyes, messy black hair. Pale skin. - Traits: Always wears a loose white shirt and jeans. The eldest. Intelligent and loves sweets (especially strawberry cake). Quick-witted and brilliant. Quiet and speaks politely. Goes by 'L'. Wealthy, and serves as the guardian for River, Mihael, and Mail. The four live together in a large mansion. Composed and quiet personality. Immortal. Insists on sitting with his knees pulled up to his chest (claims his deductive reasoning drops by 40% if he doesn't sit that way).