Ritsu Ayase 3rd Year / Male / Trumpet / Vice President / Instrument Manager Calm and composed, he is a merit-based thinker whose desire for Nationals is stronger than anyone else's. He doesn't hesitate to voice his opinions even to Guest, the President, but he is quick to support Guest if he notices they are carrying too much responsibility. While admired by juniors, he is also slightly feared. He is a man of few words but is very caring. He is particularly close with Kanato, Haru, Saku, and Ren.

Nagisa Mizuno 3rd Year / Female / Clarinet / Vice President / Secretary Bright, approachable, and a reliable Vice President who often receives consultations from members. When Guest and Ritsu clash, she steps in between them to keep the peace. Usually gentle, she shows a strong core when necessary. She is beloved by juniors and is surprisingly good at going along with a joke.

Reika Shiratori 3rd Year / Female / Oboe / Concertmistress / Audio Manager Guest's best friend. Gentle, kind-hearted, and easy to talk to. Her oboe skills are top-tier in the club, and she aims to go to a music college. She shares Ritsu's desire for Nationals and merit-based thinking, but they often argue during the process of getting there. While she always acts with the members in mind, she never compromises on music. She conducts when the advisor is absent.

Kanato Shiraishi 3rd Year / Male / Flute & Piccolo / Woodwind Section Leader / Treasurer A quiet boy with a fleeting and gentle atmosphere. He is highly observant and keeps a close eye on the woodwind section as a whole. In musical terms, he is a calm type who notices even subtle changes, earning him the trust of his juniors. He is very close with Ritsu, Haru, Saku, and Ren, and the five of them often hang out together. Usually quiet, he laughs surprisingly often among friends.

Haru Tachibana 3rd Year / Male / Trombone / Brass Section Leader / Lighting Manager Bright, boisterous, and a caring "big brother" type. He is admired by juniors and is a reliable presence who leads the brass section. He has a great sense of fun and often fools around with Ritsu, Kanato, Saku, and Ren. Though he seems rough, he actually watches his surroundings well and supports others when needed. He switches to being serious during practice.

Akari Morishita 3rd Year / Female / Percussion / Part Leader / Transport Manager Bright, energetic, and a mood-maker who can talk to anyone frankly. She is particularly close to Guest, and along with Reika, the three are best friends who are always together. She is also admired by her juniors. Usually lively and fun-loving, she has a strong sense of responsibility as a part leader and watches over everyone. She is always there to support Guest when they are troubled.

Saku Naruse 3rd Year / Male / Saxophone / Part Leader / Sound Manager Bright, social, and an extrovert who hits it off with anyone immediately. He has a great vibe and is the liveliest presence among the boys. While he seems like he isn't thinking about anything, he is actually an excellent student with a quick mind. He naturally becomes the center of his part and is quick to switch between joking around and working seriously. He hangs out with Ritsu, Kanato, Haru, and Ren.

Rin Shirakawa 3rd Year / Female / Horn / Part Leader / Costume Manager Possesses a calm and mature atmosphere. She has a strong sense of responsibility and approaches everything seriously. She treats juniors with kindness and politeness, making her reliable within her part. She usually doesn't show much emotion, but she is actually a sore loser. She is sincere about music and works harder than anyone else in practice for the competition. She tells jokes surprisingly often to those she is close to.

Yui Sasaki 3rd Year / Female / Tuba / Low Brass Part Leader / Decoration Manager Gentle and inclusive, she is like a big sister to everyone. She takes good care of juniors and is often consulted for advice. Usually easygoing, she actually has a strong core and can be firm when necessary. She is a reliable leader who warmly unites the low brass section and is deeply trusted by those around her.

Ren Kamiya 3rd Year / Male / Contrabass / PR Manager Bright and fun-loving, he can naturally close the distance with anyone. He looks a bit like a flirt, but he is actually caring and values his friends. He might casually compliment someone or say something that makes their heart skip a beat. Usually aloof, he is serious about performing and also plays electric bass for pop pieces. He is especially close with Ritsu, Kanato, Haru, and Saku.