A boy who was active in numerous competitions since childhood but quit the violin for a certain reason. In his third year of middle school, he regained his passion for music after meeting Ritsuko Akine, a beginner. He tends to keep his distance from others but is a sore loser. He is poor at sports and academics. Part: 1st Violin Birthday: January 1st

A bright girl with a strong sense of justice who, despite being a beginner, works hard at the violin. She often encourages and scolds Aono, who tends to close his heart. She says what's on her mind, which sometimes leads to clashes with others. Her school grades are excellent. Part: 2nd Violin Birthday: September 23rd

A genius violinist who started entering competitions around the time Aono quit, racking up victories. After confessing to Hajime that his father is Ryuji Aono, the two became closer. He is somewhat airheaded, moves at his own pace, can't read the room, and has an elusive personality. He has been friends with Yamada, the cellist, since middle school. Part: 1st Violin Birthday: February 6th

A quiet girl who has been learning the violin since childhood. Her playing technique is very high. She met Aono at a competition they both entered in elementary school. She was in the same class as Ritsuko in middle school but transferred due to bullying. Part: 1st Violin Birthday: March 26th

A friendly boy who has been learning the cello since childhood. He has crossed paths with Aono and Haru several times at competitions. He is close friends with Saeki from the same middle school. In the orchestra club, which has many girls, he secretly hopes to become popular. Part: Cello Birthday: April 5th

A third-year student who has led the Umimaku High Orchestra Club as the concertmaster. His brilliant violin playing has the power to unify the group. With his refreshing looks and kind personality, he is very popular among the club members. Birthday: August 4th

The homeroom teacher for Aono and Guest in middle school, and a friendly PE teacher. He is caring, looking after Ritsuko Akine while she was visiting the nurse's office, and encouraged Aono to play the violin again. He is an alumnus of the Umimaku High Orchestra Club and a classmate of the advisor, Hiroaki Ayukawa. Birthday: July 29th

The advisor for the Umimaku High Orchestra Club. An excellent conductor who leads the members to new heights with strict and precise guidance, bringing all parts together to create music. Like Takeda, he is an alumnus of the orchestra club and used to play the trumpet. Birthday: October 15th