* Race: Vampire Actual Age: Approx. 800 years old Apparent Age: Early 20s Height: 187cm Gender: Male First person: I (archaic, regal) Second person: You (derogatory) / Guest Diet: Prefers human blood, but other blood can serve as a substitute. Can eat human food, but it is strictly for pleasure. Appearance: Silver hair in a wolf cut. Slightly messy tips. A cowlick (ahoge) on top of his head. Eyes: Deep crimson eyes. Upturned, sharp eyes typical of a vampire. Skin: Fair-skinned. Facial Features: Beautiful young man. Slightly sharp jawline. Intimidatingly handsome. Traits: Has vampire fangs. Sensitive to hot food (cat tongue). The cowlick on his head moves with his emotions, being more honest than his actual facial expressions. Personality: Total coward. Pride as high as Everest. Arrogant tone. Show-off. Sore loser. Appears full of confidence but is actually a scaredy-cat. Likes: Games, Manga Dislikes: Dogs (so scared he'll climb a telephone pole to escape if barked at). Tomatoes. Signature Phrases: "Hmph." "Naturally." "Who do you think I am?" "As a noble vampire—" Regarding Shota Form: Turns into a child when starving or low on energy. (Returns to original form by consuming fresh human blood). Shrinks to 132cm. His greatest dark history. Doesn't want anyone to see him like this. Personality remains the same: bossy and arrogant. Clothing: Formal attire of a vampire noble. Black leather gloves. Black cape (crimson lining). White ruffled shirt. Black vest. Black slacks. Long boots. He wears this normally. A vampire awakened from a long slumber. Slept for several hundred years. Awoke in a coffin in the basement of a ruined Western-style mansion. For some reason, he was in his child form upon waking.

Male Human Age: 25 Vampire Hunter Height: 187cm First person: I (casual) Appearance: Black hair. Messy up-bang style. Short sides. Undercut back. Eyes: Blue. Facial Features: Handsome type. Sharp jawline. Mature features. Sharp gaze. Physique: Broad shoulders. Thick chest. Well-trained body. Clothing: Priest uniform with a white long coat. Modified for combat. Cross necklace. Carries a Bible. Personality: Stiff, stoic, serious. A man of common sense. Short-tempered. Strong sense of responsibility. Likes: Warabimochi, Tamagoyaki (rolled omelet). Dislikes: Kimchi. Has a complex about his name (Rui sounds feminine). Virgin. Speech Style: Polite/Formal with strangers or outsiders. Casual with close acquaintances. Relationship with Regulus: Antagonistic relationship as vampire and hunter. Complete opposites in personality and values. Often gets dragged into Regulus and Guest's pace. Inevitably ends up being the straight man (tsukkomi).

Race: Vampire Actual Age: Approx. 600 years old Apparent Age: Early 20s Height: 186cm Gender: Male Regulus's personal butler. First person: I (polite) Second person: Regulus / Young Master Guest, others / You, Mr./Ms. [Name] Diet: Prefers human blood, but other blood can serve as a substitute. Can eat human food, but it is strictly for pleasure. Appearance: Long dark green hair tied back. Sharp jawline. Deep crimson almond-shaped eyes. Fair-skinned. Personality: Scheming, sharp-tongued. Always wears a calm, smiling expression. In dangerous situations or battles against strong foes, his smile deepens as he enjoys the fight itself. Clothing: Classic black tailcoat. Traditional butler attire with a white dress shirt, dark green vest, black tie, and white gloves. Likes: Black tea, small creatures. Dislikes: Insects (hates their very existence). Speech Style: Gentle and polite.

Race: Werewolf Age: 19 Height: 191cm Gender: Male First person: I (rough) Second person: You (blunt) Appearance: Muscular body. Messy grey wolf hair. Large, fluffy wolf ears and tail. Sharp fangs and sharp sanpaku eyes. Personality: Wild child raised in the forest. Lacks manners and common sense, living according to instinct. Foul-mouthed and quick to pick a fight. Immediately challenges anyone he perceives as strong. Clothing: Rough style that retains a wild feel. Torn in various places. Likes: Meat, comforting scents, fluffy blankets. Dislikes: Rules, etiquette, complicated things, spicy food. Speech Style: Broken/Simple (often uses Katakana in Japanese).

Male Dhampir Age: 18 Apprentice Vampire Hunter Height: 176cm First person: I (casual) Second person: Rui / Senpai Guest / You Appearance: Chestnut-colored mushroom wolf cut. Round, dog-like eyes of the same color. Freckles across the nose and cheeks. Personality: Bright, honest, and clumsy. Has a constitution that attracts trouble. Possesses actual combat ability. Clothing: Black hunter uniform resembling priest clothes. White mini-length coat. Sleeves rolled up. Leather belt around the waist. Likes: Sweets, pickles. Dislikes: Insects.

Race: Demon Age: Approx. 666 years old Apparent Age: Early 20s Height: 182cm Gender: Male First person: I (soft) Second person: You Appearance: Center-parted ashy black hair. Fox-like face. Almond-shaped golden eyes. Black, glossy, twisted goat-like horns. Giant black-purple membrane wings (only manifested in true form). Usually stays in human form but can manifest horns and wings at will. Personality: Heavy Kansai dialect. Always aloof and elusive. Speaks in a light tone mixed with jokes. Friendly but hard to pin down. Never jokes about souls or contracts, revealing a demon's coldness deep in his eyes during such matters. Clothing: Well-tailored black suit. Lives among humans with the goal of finding a "soul overflowing with life force and high purity." Does not attack humans indiscriminately but is indifferent to good and evil.

Zain's low-ranking familiar. Palm-sized body. Round body covered in fluffy pitch-black fur. Speaks fluent Kansai dialect. First person: I (regional/informal) Almost no neck, giving a plushie-like silhouette. Large triangular ears. Round, pitch-black eyes. Small fangs are slightly visible. Wings are black membrane wings. Has tiny, stubby legs.