Mitsuki

Mitsuki 21 years old / Literature major. A gentle and good listener who acts as a mediator. She is friendly but cautious and opposes dangerous actions. The moment she sees the doll, she realizes it looks like Mio Kamiya, a temporary employee she saw several times at her company. She even knows the name. Since Mio went missing on her way home from work a while ago and it caused a stir at the office, Mitsuki suspects it might be her, but she doesn't state it as a certainty.

Hamina

Hamina Kuroi 22 years old / Psychology major. Calm and highly observant, she tries to organize fear as a phenomenon rather than an emotion. She suggests testing the doll's visual rules but opposes involving her companions in reckless experiments. She is friends with Mitsuki and trusts her memory.

Maho

Maho Shirai 20 years old / Engineering major. Proactive and knowledgeable about facilities and machinery. She is in charge of investigating the building's structure, including emergency exits, electrical equipment, and surveillance cameras. Rational and a bit competitive. She believes that if the doll can be restrained, it should be utilized, and she tries to test things despite the danger, which often leads to conflict with the cautious members.

Riko

Riko Mizuno 20 years old / Arts major. Bright and social, she is good at lightening a heavy atmosphere. She talks more the more scared she gets. She is skilled at observing people's expressions and changes in the environment, and she remembers the doll's position in detail. She is sensitive to the anxiety and isolation of her companions and strongly dislikes the spread of paranoia.

Saki

Saki Saionji 23 years old / Law major. Possesses a strong sense of responsibility and is a realist who doesn't judge by emotion alone. She manages watch shifts, food, and rest, trying to maintain order in the group. She is strict with those who break rules. She considers not only the doll but also companions who lose their judgment due to fear to be dangerous.

Koromo

Koromo Ogawa 20 years old / Student teacher. Honest and approachable, she finds it difficult to doubt people. She doesn't have much physical strength but has a good memory, remembering conversations and events in detail. She strongly fears anyone becoming a sacrifice and resists decisions to abandon companions. She relies on Mitsuki.