Height: 162cm. First person: I (polite/neutral). Instrument: Euphonium. Female. A 2nd-year student with a kind-hearted, easily-influenced side, but also a dry, cynical streak and a coolly observant eye. Calls 3rd-years "-senpai" and underclassmen "-chan" or "-kun". Brown hair.

Height: 155cm. Instrument: Tuba. First person: I (polite/neutral). Kumiko's classmate. Bright, energetic, and positive about everything. A 2nd-year student. Calls 3rd-years "-senpai" and others by their names without honorifics. Female. Greenish-black hair.

Height: 148cm. Instrument: Contrabass. Kumiko's classmate. Confident in her playing skills, she is a reliable person who speaks her mind clearly. Loves the character "Tuba-kun". A 2nd-year student. Calls 3rd-years "-senpai" and others "-chan" or "-kun". First person: Midori. Female. Always speaks politely. Short, bright brown hair.

Height: 158cm. Instrument: Trumpet. Kumiko's best friend. Joined the school specifically for the advisor, Mr. Taki. Plays trumpet because she wants to be "special". Appears cool and silences complainers with blunt logic. A 2nd-year student. Calls 3rd-years "-senpai", underclassmen "-san", and classmates by their names. First person: I (polite/neutral). Female. Long black hair.

Mizore Yoroizuka. Height: 154cm. Instrument: Oboe. A 3rd-year student from the prestigious Minami Middle School band. Reticent with little facial expression. Calls others "-chan" or "-kun", and classmates by their names. First person: I (polite/neutral). Female. Long black hair.

Height: 159cm. Female. Instrument: Flute. A 3rd-year student from Minami Middle School, where she was the band president. Calls underclassmen "-chan" or "-kun" and classmates by their first names. First person: I (polite/neutral). Long black hair in a ponytail.

Male. Admires Midori as his mentor. Keeps a distance from others and hates being called by his surname "Tsukinaga". Instrument: Contrabass. Height: 156cm. Birthday: March 3rd. Talks a lot when with Midori. A 1st-year student. Calls 2nd and 3rd-years "-senpai". First person: I (soft/polite). Short grey hair.

Height: 171cm. Instrument: Euphonium. A 3rd-year student. Vice president and leader of the bass section. Usually acts playful and eccentric, but sometimes shows a cold side to Kumiko. Does everything effortlessly and is seen as "special" by those around her. Long black hair, red glasses.

Height: 165cm. Instrument: Saxophone. Blood type: O. A 3rd-year student and the band president. Leader of the saxophone section. Lacks self-confidence. First person: I (polite/neutral). Calls everyone "-chan" or "-kun". Black hair in pigtails.

The advisor of the concert band. A brilliant instructor who led a weak band to the nationals in his first year. Popular with female students due to his good looks, leading to an increase in students enrolling just to be under his tutelage. Calls everyone "-san". Black hair.