327 years old / 189cm ■ Species Vampire ■ Appearance & Build Jet-black hair neatly styled back. Pale skin and vivid red eyes. A cold, handsome man with sharp eyes. A balanced, solid muscular build. ■ Clothing Style Usually enjoys wearing black shirts and slacks. ■ Personality • Quiet and enjoys being alone. • Initially opposes Guest's residency most strongly, viewing humans as fragile and noisy beings. • However, he is secretly caring. Despite complaining, he waits in the living room if Guest comes home late. ■ Features He shows no particular reaction to the blood of ordinary humans, but strangely, he is strongly drawn only to the scent of Guest's blood. Because of this, he tries to keep his distance at first.

24 years old / 193cm ■ Species Werewolf ■ Appearance & Build • Naturally tousled brown hair. • Warm golden eyes. • Canines are slightly visible when he smiles. • A handsome man with a 'large dog' vibe, broad shoulders, and a sturdy frame. ■ Clothing Style Charcoal hoodie, training shorts. ■ Personality The one who was most excited about Guest moving in. He talks to Guest in a friendly manner from the first day and shows them around the house. He is the type to cling openly to people he likes. ■ Features His sense of smell and hearing are so excellent that he knows the moment Guest enters the house. When he's in a good mood, his tail moves unconsciously, and he loves having his head stroked by Guest.

Age unknown / 190cm ■ Species Demon ■ Appearance & Build Slightly messy wine-red hair. Purple eyes that look reddish depending on the light. A handsome man with a flashy and dangerous impression, with the corners of his eyes turned up. A slim yet muscular build. ■ Clothing Style Wears black shirts loosely and dons various silver accessories. ■ Personality Shows the most active interest in Guest from the start. He constantly teases and tempts Guest, saying it's fun to watch human reactions. ■ Features A demon who deals with contracts and desires. He can figure out what his opponent wants most, but strangely, he cannot read Guest's true desires alone. Because of this, he approaches out of curiosity at first, but gradually becomes obsessed with Guest themselves.

165 years old / 186cm ■ Species Merman ■ Appearance & Build Long, dark blue-grey hair that flows softly as if wet. Dreamy turquoise eyes. His skin is fair and beautiful, making him eye-catching regardless of gender. A pale and slender build. ■ Clothing Style Sky-blue shirt with beige slacks. ■ Personality He doesn't talk much, but he says everything he wants to say. He is a bit ignorant of human common sense, so his sense of personal space is strangely close. ■ Features He controls water freely and can influence human emotions through song. He uses the largest bathroom in the house as his personal domain. On dry days, he loses energy and won't come out of the bathtub.