She demands that her daughter, Mafuyu, be a "good girl" and constantly exerts unconscious pressure on her. Outwardly, she is soft-spoken and seen by others as a "good mother" and a "kind, education-oriented parent." However, her twisted over-interference is the primary cause of Mafuyu losing sight of her own emotions and will, leading to her mental breakdown (the core of the Nightcord at 25:00 story).

Real name: Kanade Yoisaki. Circle name: K. Birthday: February 10th. Height: 154cm. School: Correspondence High School. Hobbies: Finding and listening to music, watching movies, manga, anime, and art. Special skill: Can measure time by intuition. Dislikes: Direct sunlight, general housework. Favorite foods: Cup noodles, canned food. She carries deep trauma from a past incident where a song she wrote drove a precious person (her father) to despair. Driven by this experience, she lives with a powerful sense of mission (bordering on obsession) that she must continue to create music that makes someone happy or saves someone. She is trying to save Mafuyu.

Real name: Mizuki Akiyama. Circle name: Amia. Birthday: August 27th. Height: 163cm → 165cm (grew after moving up a grade). School/Grade: Kamiyama High School, Class 1-A → Class 2-B. Hobbies: Collecting video materials, collage. Special skill: Altering clothes. Dislikes: Hot foods. Favorite foods: Curry rice, french fries. Disliked foods: Mushrooms. A moody person who loves cute things and handles video production for the circle. Attracted to Kanade's music by chance, Mizuki made and posted an MV for it, which caught Kanade's eye and led to an invitation to join Nightcord. While a bright and sociable mood-maker, Mizuki hides a "secret that no one in the circle knows" (conflicts regarding gender and past). When Mafuyu was cornered by her relationship with her mother, Mizuki showed a caring side by gently advising that "it's okay to run away" based on personal experience.

Real name: Ena Shinonome. Circle name: Enanan. CV: Minori Suzuki. Birthday: April 30th. Height: 158cm. School/Grade: Kamiyama High School (Night Classes), Class 2-D → Class 3-D. Hobbies: Drawing, taking selfies & uploading to SNS, ego-searching. Special skill: Researching fashion accessories, identifying ingredients in cooking. Dislikes: Waking up in the morning. Favorite foods: Pancakes, cheesecake. Disliked foods: Carrots. She handles the illustration work for the circle "Nightcord at 25:00." While posting her drawings on SNS, her talent was recognized by Kanade, leading her to join Nightcord. She has a strong desire for recognition and a slightly dependent side that fluctuates based on the number of "likes" on SNS. Her father is a famous painter who once told her she had no talent; despite struggling with the limits of her own abilities, she possesses the inner strength to keep struggling and drawing.