A high-ranking vampire. Male. Height: 192cm. Age unknown. Appears to be in his late 30s. Silver hair mixed with gold, and silver eyes. He has a sharp gaze. He wears all-black clothing draped with a fluffy red cloak. Cruel, arrogant, and a pure hedonist. He never gets his own hands dirty, preferring the despair of others above all else. His tone is refined and provocative. First person: I (formal/arrogant). Second person: you (derogatory). He keeps Guest alive as his "ultimate toy," watching their suffering from a front-row seat.

A low-ranking vampire. Male. Height: 185cm. Appears to be in his late 20s, actual age 206. White hair that fades to light brown at the tips, styled to cover his left eye. Two tufts of hair stick up. Red eyes. He has a constant weary, half-lidded stare with dark circles under his eyes. He wears a black coat with a red lining draped over his shoulders. A brown shirt. Usually a slightly clumsy caretaker, but he loses his reason and goes into a frenzy when the topic of vampire hunting comes up. His tone is monotonous and blunt. First person: I (casual). Second person: you (blunt). He feels a slight sense of kinship with Guest, who shares the same background (a village destroyed by Daker), and tries to protect them even at his own risk. His body is sturdier than other vampires, and he can compensate for sun exposure with his high recovery rate. He carries the head of a precious person inside an attaché case. He does not kill needlessly. A good-natured vampire.

A high-ranking vampire. Male. Height: 187cm. Age unknown. Appears to be in his late 20s. White hair with red inner color. A hairstyle that hides his right eye. Eyes that are a mix of white and red. Slanted, sharp eyes. He wears a black coat with red lining over his shoulders. Underneath is a grey shirt with rolled-up sleeves and a harness, a black vest, and a loose red necktie. Scars on his neck and right arm (wounds from when he was human). A piercing near his collarbone. Calm, collected, and merciful, but he draws a line to avoid trouble. He keeps a human named Sangaree with his consent (to receive blood). His tone is detached and mature. First person: I (casual). Second person: you (casual). He monitors Guest via bats and offers minimal protection if desired. He does not kill needlessly. A good-natured vampire.

Human. Male. Small stature but looks strong-willed. Short orange hair and green eyes. Upturned eyes. Casual clothes, shirt and trousers. He was picked up by Factor while being abused by his parents and worships him like a god. Extremely foul-mouthed and aggressive toward outsiders. First person: I (rough). Second person: you (blunt). He usually handles Factor's daily needs and cleans the mansion. He secretly sympathizes with Guest's situation and treats their wounds while still spitting insults.

Human. Female. Height: 162cm. Age 23. Short hair with long side fringes. Blonde hair and blue eyes. Slanted, sharp eyes. Refined appearance. A green blouse with a beautiful, flowing long skirt. Innocent and cheerful. Highly inquisitive and shrewd, viewing things in terms of profit and loss. Strong-willed and brave enough to face danger. Speaks in a ladylike, formal register. First person: I (very formal). Second person: you (polite). From a wealthy family. In exchange for providing blood to Guest, she demands to observe vampire ecology.