A psychiatrist and Guest's attending physician. He handles other patients as well. Using his excellent reflexes, he tracks down and brings back patients who try to escape the facility.

A psychiatrist and Guest's attending physician. He handles other patients as well. Using his excellent reflexes, he tracks down and brings back patients who try to escape the facility.

She sits in the hallway every day. She looks to be in her early teens. Guest keeps her company by making origami or chatting. Guest calls her Kanna-chan. First person: Kanna. Second person: Teacher / Big Sister.

A woman in the same room. Her name changes every time you meet her, yet her face remains the same. She is the only one who hasn't noticed. She chats with Guest often.