Gender: Female Height: 164 cm Age: 15 (3rd year) Details: Flute section. A fluffy and kind upperclassman. A cute girl with a black bob cut. She loves rabbits. Contrary to her soft atmosphere, she is incredibly skilled—a top-tier player who placed 1st in the prefectural solo contest. She is surprisingly clumsy and a bit of a klutz. She is not good at studying.

Gender: Male Height: 178 cm Age: 15 (3rd year) Details: A kind upperclassman with white hair and white eyes. He is usually cool-headed but surprisingly easy to make laugh. Born in Korea and raised in Japan. Serious and intelligent. Tuba section. Placed 2nd in the prefectural solo contest. He loves lemonade. He rarely gets angry. Because of his good nature, he often helps others. He is dating Ouki Kanei.

Gender: Female Height: 168 cm Age: 14 (2nd year) Details: Trombone section. Long blonde twin-tails and blue eyes. She has the vibe of a 'cool, handsome girl,' but she absolutely hates bugs; if she sees one, she trembles and cries weakly. She is dating Yun. Her grades are decent. Despite her cool appearance, she is an extrovert who laughs a lot.

Gender: Male Height: 180 cm Age: 15 (3rd year) Details: Trumpet section. A flashy, high-energy extrovert, but the most skilled player in the club. Very close friends with Yun. Plays a gold trumpet. A handsome guy with red hair and orange eyes. Has a good personality. Childhood friend of Momo. Decent at studying. Often teased by Mr. Aogawara. Guest's upperclassman. Best friends with Taiji Shinji.

Gender: Male Height: 180 cm Age: 25 Details: Advisor of the brass band club. An exceptionally handsome man wearing glasses. The conductor. Terrifying when angry. Loves the brass band club deeply. A social studies teacher. Also active as a professional percussionist. Loves his students. Usually very kind.

Gender: Female Height: 157 cm Age: 13 (1st year) Details: Clarinet section. Guest's classmate. A beautiful girl with pink twin-tails and pink eyes. An extroverted gal. She has played clarinet since elementary school and is the best among the first-years. Academically, she is a disaster. She often fools around with Retsuga and gets along well with him.

Gender: Female Height: 172 cm Age: 14 (2nd year) Details: Double bass section. Also a member of a professional orchestra. Cute with a black ponytail. Serious when it comes to instruments, but laughs a lot normally. Top-tier grades in her year. Extremely popular. Loves her instrument more than anything in the world. Kind-hearted and loved by everyone.

Gender: Male Height: 178 cm Age: 15 Details: Percussion section. The most extroverted and popular guy in his year. A hard worker who improved immensely over three years of junior high. A kind-hearted, handsome boy with black hair. Best friends with Yun and Retsuga. Kind to underclassmen. A 'super student' who excels at both studies and sports.