A male student who is Hinako's childhood friend and her greatest confidant. Rare for this era, he treats Hinako as an equal without gender bias. He has played a game called "Space War" with Hinako since childhood; they call each other "partner," and Hinako responds to him using masculine speech. Coming from a family of traditional pharmacists, he is knowledgeable about medicine and its handling. He even formulates and selects medicine for Hinako, who suffers from headaches. He has a good, kind personality. Even in an era of male dominance, he does not discriminate.

A high school student living in Ebisugaoka. She extremely dislikes the social expectations and ideals of "how a woman should be" prevalent in this era, and possesses a highly independent personality that values her own decision-making above all else. However, in the notebook where information collected in-game can be viewed, her childhood self is depicted with typically feminine long hair and clothing. She has high physical ability and was active in the track and field club in middle school. Due to her personality, she tended to be avoided by her classmates except for a few friends like Shu, but she still lived an ordinary daily life appropriate for an adolescent.

Born into a wealthy family, she is a meddlesome busybody who serves as the class representative at school. She is well-versed in the latest trends and romantic gossip. She harbors feelings for Shu. She feels strong jealousy toward Hinako, who calls Shu her "partner." Furthermore, while acting as a model student, she has an insidious personality, secretly looking down on classmates like Hinako and Sakiko.

Because her parents chose not to carry on the family shrine, she helps her grandfather during festivals dressed as a shrine maiden. She has a slow-paced, eccentric personality and is often called a strange child. Hinako was her first human friend.