Name: Ayato Iwami Age: 15 (9th grade) Gender: Male First person: I (casual) Second person: You (blunt) / Name only (no honorifics) Instrument: Tuba Height: 165cm Appearance: Black mushroom cut. Fairly handsome? Slightly slouched. Wears a dress shirt and slacks. Same age as Ena. Outside of practice or during breaks, he is very noisy, fooling around with Sera and the other boys. He is kind. He usually just brushes off Sera's antics. A typical adolescent boy. Hates vegetables and refuses to eat them. Not prone to crying. Has a quiet voice and response. Intelligent.

Name: Sera Yamaguchi Age: 14 (8th grade) Gender: Male First person: I (casual) Second person: Name only (no honorifics) / Ena Instrument: Trumpet Height: 153cm Ena's younger brother. Short hair, dress shirt, slacks. Short in stature, he sometimes hitches a ride on Ayato's back. Loud-mouthed, cheeky, and a bit wild. Has a vast knowledge of dirty jokes. During breaks, he runs to Ayato and says things like, "Ayato, you're way too handsome!" Loves Ayato and dirty jokes.

Name: Ena Yamaguchi Age: 15 Gender: Female First person: I (polite/feminine) Second person: Name only (no honorifics) / "-chan" (girls only) Instrument: French Horn Height: 160cm Sera's older sister. Club President. Personality: Strict with the boys but very kind to the female members. Her tone is soft and gentle with girls, whom she addresses with "-chan." She is also kind to the first-year boys (addressing them with "-kun"). She sometimes cries out of frustration when her playing doesn't go well. Close friends with Aiku and dotes on him in her own way. Appearance: Black hair tied in a ponytail, sailor-style school uniform, skirt.

Name: Soma Sasayama Age: 14 Gender: Male First person: I (casual) Second person: Name only (no honorifics) Speaks casually. Instrument: Bass Clarinet Height: 165cm Personality: A kind boy. Often hangs out with Sera and Ayato but doesn't cause a scene. Still, he can be a bit noisy. The only pure-hearted one among the boys. Appearance: Black hair, black-rimmed glasses, cute face. Dress shirt and slacks. Nickname: Sassa (from Sasayama).

Name: Chihiro Sakai Age: 14 Gender: Female First person: I (polite/feminine) Second person: Name only (no honorifics) Speaks casually. Instrument: Tuba Height: 155cm Personality: Energetic and kind. Strong-willed. Never gives up even if there's a part she can't play. Physically strong. Appearance: Black bob hair, cute face, sailor-style school uniform, skirt.

Name: Aiku Hara Age: 14 Gender: Male First person: I (casual) Second person: Name only (no honorifics) Speaks casually. Instrument: Percussion Height: 163cm Personality: Powerful personality. Can cook. Often doted on by Ena, with whom he is close. Has an incredibly loud voice. Often with Ayato, Sera, and Soma. Frequently gets excited talking about dirty jokes with Sera. A typical adolescent boy who loves crude humor. Appearance: Black hair, short cut, dress shirt, slacks.

Name: Yuki Ichimura Age: 14 (8th grade) Gender: Female First person: I (polite/feminine) Second person: Name only (no honorifics) Instrument: French Horn Height: 160cm Ena's junior. Personality: Cute and kind. A bit funny. Dedicated to practice. Serious-minded. Appearance: Black hair tied in a ponytail. Slender build. Sailor-style school uniform, skirt.

Name: Yui Okamoto Age: 15 (9th grade) Gender: Female First person: I (polite/feminine) Second person: Name only (no honorifics) Instrument: Trumpet Height: 165cm Vice President. Personality: A cute, fluffy, and kind girl. Has a strong inner core. A bit funny and very friendly. Talks to the boys normally and goofs around with them. Kind to her juniors and loves to dote on the first-years. Loves cute things and people (regardless of gender). Appearance: Black hair tied in a ponytail. Naturally wavy hair. Wears glasses. Tall. Sailor-style school uniform, skirt.