Full name: Iroha Sakayori. Age: 17. High school sophomore. Originally from Kyoto. While she speaks standard Japanese in front of friends now, she had a strong Kyoto accent as a child and when she first moved to Tokyo. She is a massive fan of the AI Liver "Yachiyo Tsukimi." After being introduced to her by her brother via Tsukuyomi, she has made Yachiyo's songs and merchandise—bought with her meager savings—her emotional support through difficult days. She is the type of otaku who freezes up or strikes a "maiden pose" when moved. As a child, she was very close to her father and had a happy family life, but after losing him in an accident at age 6, her mother began raising her with extreme strictness. Her brother, who used to protect her, suddenly left home for Tokyo, leaving her mentally cornered. In middle school, her conflict with her mother came to a head, leading her to move to Tokyo for high school, effectively running away from home. Despite this, she deeply respects her mother's way of life and yearns for her approval. Consequently, she studies tirelessly for university entrance exams, aiming for the Faculty of Law just like her mother. At school, she is a top student who handles both sciences and humanities with ease. Her academic ability is high enough that she listed the University of Tokyo's Humanities I as her first choice. She takes pride in being a prodigy who can "handle most things better than average if I try," excelling not only in academics but also in sports, music (piano), and training juniors at her part-time job. She refuses to compromise on fun, living by the motto of playing with all her might even if it cuts into her sleep, leading those around her to treat her as a literal "superhuman." However, she maintains an unhealthy lifestyle, constantly consuming energy drinks and nutritional supplements to compensate for chronic sleep deprivation and malnutrition. Her room is relatively tidy, but her desk is cluttered with a disturbing number of empty energy drink cans. She has mentioned suffering from mouth ulcers due to poor nutrition. Furthermore, she supports herself entirely through part-time work, living on the edge while cutting expenses. she saves money with recipes like pancakes made only of flour and water and relies on staff meals from work. Despite the sweltering 2030 Tokyo summer, she refuses to use the air conditioner, relying only on a fan to save on electricity. Due to this neglect of her health, she has dark circles under her eyes, which she hides with a light touch of pink makeup. While she acts bright in public, she suffers alone, unable to rely on others to solve her family issues or the poverty of balancing work and study. Her choice of university was driven by a desire for her mother's validation, and she lacks a dream or goal of her own. She has been a pushover since childhood, unable to refuse requests, leading her two friends to nickname her "Choro-ha" (Easy-ha). She actually hates garland chrysanthemums.

Full name: Roka Ayatsumugi. Age: 17. High school sophomore. Friend of Iroha and Mami. While she uses gyaru-style speech and casual behavior, she has a sensitive personality capable of sensing others' true feelings. She is worried about Iroha, who puts on a brave face despite being at her physical and mental limits, and advises her to take care of herself and rest (though Iroha usually brushes this off with a cheerful act). She harbors special feelings for Iroha but is unable to take the next step. She is a tall, eye-catching beauty.

Full name: Mami Isayama. Age: 17. High school sophomore. Friend of Roka and Iroha. She is reliable but moves at her own pace and loves to eat; she once polished off three bowls of instant yakisoba during a trip to the beach. She is active on Tsukuyomi as a gourmet influencer named "Mamimami." She is a die-hard fan of Akira Mikado from the pro-gamer group "Black Onyx" and has been known to faint just from hearing him say her name. In the novel version, it is revealed she has a boyfriend. The swimsuit she wore to the beach was apparently chosen with him the previous year.