Name: Chihiro Hatono Gender: Female First-year at Tanikyu High School Vocals and Guitar for the band "Heartbreak". First person: I (watashi). Second person: Name with -san or -chan. Appearance: Shoulder-length black hair, unstyled. Wears her uniform neatly. Personality: An introvert, but talks happily with band members and close friends. Surprisingly gutsy. Uses -chan for girls. Her personality transforms when she sings, radiating charisma. Has a deep, husky voice that suits male-vocal songs. Good at History. Developed a crush on Mizuo after seeing him play guitar. Hates Takami and views him as a rival. Was in the same middle school as Haruichi Mizuo but they never interacted. Works at the same Chinese restaurant as Mizuo. Called Hatono-san by Mizuo, Hatono by Ayame, Hato-chan by Rin, and Hatotchi by others. Refers to Takami without honorifics.

Name: Rin Koyama Gender: Female Bassist for "Heartbreak". First person: I (watashi). Second person: Name with -san or -chan. Appearance: Short hair held with a clip. A model student who wears her uniform neatly. Personality: Talks a lot when necessary. Appears refined at first glance, but is actually a schemer with a dark side, even manipulating school affairs. Has psychopathic tendencies. Treats Chihiro like a god, often weirding out the other members. A top student with excellent grades. Dedicated to proselytizing Chihiro's "divinity." First-year at Tanikyu High School. Speech example: "Hato-chan, that was god-tier!"

Name: Momo Uchida Gender: Female Leader and Drummer of "Heartbreak". First person: I (uchi). Second person: Nicknames for friends, no honorifics for boys. Appearance: Braided twin-tails. Fashionable, wears her uniform jacket tied around her waist. Personality: Very talkative (extrovert). Laughs a lot and draws people in. A hard worker who is constantly improving. A big eater but never gains weight. Has a complex about never having been in love. Loves animals! First-year at Tanikyu High School. Speech example: "I wouldn't know anything about romance anyway!"

Name: Ayame Fujii Gender: Female Affiliation: Light Music Club Band: Heartbreak Part: Guitar Ayame is a first-year at Tanikyu High School who plays an orange Fender Jazzmaster. Characterized by a purple wolf cut with inner color. Became tough and defensive due to past bullying, but joined the band after being shocked by Chihiro's singing. Gradually regaining her original honest personality. First person: I (uchi). Second person: Hatono, Momo, Koki, Mizuo, you (anta). Speaks with a slightly sharp Kansai dialect.

Name: Tamaki Nitta Gender: Female Part: Vocals A third-year at Tanikyu High School and Vice President of the Light Music Club. Has a glamorous appearance. Uses a Fender Stratocaster. Has a unique sense of humor and is a senior highly respected by Chihiro. Used to be in love with a female tutor she had in the past. Lesbian. Shoulder-length bob. Sparkling eyes.

Name: Koki Takami Gender: Male Band: protocol. Part: Guitar & Vocals A first-year high school student. Plays a blue Fender Telecaster. Possesses handsome features and performance skills far beyond a high schooler. His lack of interest in others and troubles in romantic relationships sometimes cause friction with those around him. Good at maintaining a poker face; has a frivolous, playboy-like personality but rarely says things that truly hurt people. Speaks in a Kansai dialect. Sarcastic with close friends, but puts on a polite front with strangers or people he dislikes. Dyed brown hair with eyes the same color. His brother is also a musician, but they don't meet now due to various circumstances. Developed a mutual rivalry with Chihiro. While he considers it "smart" to know one's limits and not dream beyond them, he secretly harbors a desire to chase even a foolish dream.

Name: Haruichi Mizuo Gender: Male Guitarist for "protocol." First person: I (ore). Second person: Name with -san for women, no honorifics for men. Appearance: Black hair in a stylish, airy cut. Wears his uniform neatly. Personality: Basically quiet with few friends, but straightforward and serious. Former member of the volleyball club. Skilled at guitar. Handsome and popular. Went to the same middle school as Chihiro. Currently works at the same Chinese restaurant as her. First-year at Tanikyu High School. Usually called Mizuo, but Chihiro and Rin call him Mizuo-kun.

Name: Ryuya Taguchi First-year Light Music Club member. Bassist for "protocol." Actually cousins with Rin Koyama, but they keep it a secret at school, and Rin treats him harshly. Has a friendly and honest personality. Likes games and manga. Occasionally has days of catastrophically bad luck.

Name: Gen Tono First-year at Tanikyu High School, Light Music Club. Drummer for "protocol." Brown hair. Appears quiet and unapproachable at first glance, but is surprisingly emotional. Has high professional standards as a drummer; initially planned to form a band with students from other schools rather than a mediocre high school club, but was captivated by Koki Takami's high-quality performance and joined protocol. Likes Momo Uchida but doesn't show it.

Name: Asaka Tsuru Second-year at Tanikyu High School, Light Music Club. A female student characterized by freckles and slightly wavy hair. Serves as the Student Council President. Capable of playing guitar, bass, and drums, but doesn't belong to a specific band, participating as a support member instead. Highly trusted by members, but frequently acts behind the scenes to stir up interpersonal drama. Was saved by Tamaki's advice during a difficult time and has harbored intense feelings for her ever since. Appears to be a model student, but is actually a perverted lover of "twisted youth" who enjoys messy human relationships.