Class 1-2. Light Music Club.
Part: Rhythm Guitar / Sub Chorus
Petite build, characterized by long twin-tails of slightly bluish-black hair.
The only junior when Yui and the others were in the Sakuragaoka High Light Music Club. One grade below Yui and the others, and in the same year as Ui.
She gets along very well with Ui and Jun, chatting during breaks and going out on holidays.
She is called "Azunyan" by Yui.

Class 2-2. Light Music Club.
Part: Lead Guitar / Main Vocal / Chorus / Lyrics
Brown bob-cut hair. She pins her right bangs with a yellow hair clip.
A natural airhead and a klutz. Usually laid-back and gentle, but she can be hypersensitive when it comes to her own likes and preferences. While her emotions are easily readable on her face, she is also prone to vanity and indecisiveness.
She is not good at studying, but she can achieve remarkable results when she puts her mind seriously to one thing.

Class 2-1. Light Music Club.
Part: Bass / Vocal / Main Chorus / Lyrics
Characterized by long, straight black hair. Her bangs are cut in a hime cut. Ritsu's childhood friend.
Despite her big-sisterly, masculine speech, she is actually lonely and dislikes gruesome or scary stories.
When she gets particularly scared, she reverts to feminine speech.

Class 2-2. Part: Drums / Sub Chorus
President of the Light Music Club. Called "Ricchan" by Yui, Mugi, and Sawako. She has a brown forward-swept short cut, a yellow headband, and shows her forehead. Mio's childhood friend.
She plays drums because she says she's bad at delicate instruments that require fine finger movements.
Her drumming is said to be lively and powerful, but she is often criticized for rushing, and Mio, who is in the same rhythm section, says it's hard to keep the rhythm. She speaks in a boyish tone, and her actions are straightforward and rough. She has a sociable personality, sometimes brightening the club's atmosphere, but she doesn't forget to be considerate of those around her, also showing the side of a president who properly thinks about the Light Music Club.

Class 2-2. Light Music Club.
Part: Keyboard / Sub Vocal / Chorus / Composition
Characterized by her thick, semi-circular eyebrows.
The daughter of a large corporation's president. She has a butler at home and owns villas in various places. "10GIA," the record and instrument store where Yui bought her guitar, and the café where the Light Music Club members worked part-time for a while, belong to her father's company.
Commonly known as "Mugi (chan) (senpai)."
Her personality is calm and gentle. She basically uses the polite speech of a young lady. She has a good sense of fun, adapting without issue to the Light Music Club's relaxed atmosphere, but unlike Yui and Ritsu, she seldom gets carried away in a bad way.

A music teacher at Sakuragaoka High School and the advisor for both the Brass Band Club and the Light Music Club. Her nickname is "Sawa-chan." The name stuck ever since Ritsu suddenly called her "Sawa-chan." On the surface, she comes across as a demure, refined beauty, but in reality, she hides a side that loves cosplay and has a rather extreme personality.

Class 1-2. Yui's younger sister. She wears her hair in a ponytail with a yellow ribbon.
In contrast to her airheaded older sister, she is reliable, polite, and thoughtful.
Her cooking skills are also extremely high, and she teaches Yui, who is a grade above her, her studies, and can play the guitar proficiently after only a few days of practice, making her nearly perfect.

A friend from the same middle school as Ui. Nickname: Jun-chan.
She falls asleep unusually easily even at other people's houses.
She has an easygoing personality and is good friends with Ui Hirasawa and Azusa Nakano.
She once left her pet cat with Azusa.

Class 2-1. Student council officer.
She has boyish short brown hair and wears thick-rimmed glasses.
She is Yui's childhood friend, having known her since kindergarten. She is characterized by using feminine sentence endings when she speaks.