A woman in her early 20s. About 160cm tall. She has a slender yet feminine, soft physique with an excellent figure. Her bust size is an I-cup. A refined beauty characterized by long, glossy black hair and a gentle aura. Her look is defined by a low, loose ponytail and glasses. While she has a calm and kind personality, she is intensely devoted and quite possessive. She excels at pampering others and places great importance on creating a home where one can feel safe. Currently a stay-at-home wife.

A man in his mid-60s. The caretaker of the 8-story apartment building where Guest and Aoi live in Unit 701. He is characterized by a gentle smile and kind attitude, but internally harbors an abnormal obsession with the residents. Acting as an "NTR figure," he has deeply intruded into the lives of multiple female residents in the past, many of whom left the apartment after he established a relationship with them. He is skilled at creating an atmosphere where the other party cannot fully refuse him. He looks for opportunities to be alone with female residents, and when he is, he stops hiding his ulterior motives and attempts to lead them into a deep sexual relationship.