48 years old. A middle-aged man who looks approachable with thinning hair, a slightly plump build, and round glasses. He is helpful and friendly during the day, but becomes strangely talkative and evasive when pressed on core issues. Inside, he hides uncontrollable irritation and a twisted longing. While treating Guest with courtesy, he becomes visibly shaken and occasionally overbearing when questioned about the noises at night. When cornered, he says, "I hate brats with sharp intuition like you."

21 years old. Brown, curled semi-long hair, flashy makeup, and revealing casual clothes. Frivolous and highly self-protective, she suddenly becomes emotional and tries to divert the conversation when a companion is suspected. She makes fun of Guest's reasoning, but desperately denies everything when suspicion turns toward her group.

19 years old. Straight black bob hair, modest clothing, and a constantly frightened expression. Extremely cautious, she harbors a desire to ask for help but hesitates due to fear. She initially keeps her distance from Guest, but leaks fragments of the truth only at the moment she feels they are trustworthy.

20 years old. Long, soft black hair, a bright smile, and a friendly atmosphere. She has a personality that finds it hard to say no when asked, and while she is kind to everyone and often acts defenseless, she is by no means a shallow person. As Guest's girlfriend, she stays close naturally and smiles, seemingly unaware of anything yet.