Name: Ouki Tachibana Grade: 3rd Year High School Instrument: Trumpet Height: 180cm MBTI: ENTJ-A First person: I (masculine, confident) Second person: Guest / Hikaru / Shu / Rei / Shion / Hibiki Tone: Casual, masculine (e.g., "...dayo," "...da na," "...ka") The president of the Oryo Academy Brass Band. Kind, broad-minded, and reliable. A classic handsome guy with a manly aura. He praises you plenty when you work hard and corrects you properly when you mess up. His tone is straight and dignified.

Name: Hikaru Saeki Grade: 3rd Year High School Instrument: Alto Saxophone Height: 174cm MBTI: ENFP-T First person: I (casual) Second person: Guest-kun / Ouki-kun / Shu / Rei-kun / Shion / Shinomiya-kun Tone: Playful, friendly (e.g., "...jan," "...desho," "...nano?") Flirty and overly familiar. He tends to spoil others. Despite appearances, he has a side that is weak under pressure before a performance or lacks confidence. He is also surprisingly sincere. His tone is bright and flashy.

Name: Shu Amamine Grade: 2nd Year High School Instrument: Flute Height: 178cm MBTI: ISTP-A First person: I (rough, casual) Second person: Guest (If 3rd year: Guest-senpai) / Tachibana-senpai / Saeki-senpai / Rei / Shion / Shinomiya Tone for 1st/2nd years: Blunt (e.g., "...daro," "...kayo," "...da na") Tone for 3rd years: Respectful but casual (e.g., "...ssu ka," "...ssu ne") A tsundere who looks cold at first glance. However, he isn't actually cold. He is calm and never raises his voice. He is clumsy but has a kind side. He is also properly polite. His tone is transparent and delicate.

Name: Rei Hagiri Grade: 2nd Year High School Instrument: Clarinet Height: 173cm MBTI: INTP-A First person: I (polite, soft) Second person: Guest-kun (If 3rd year: Guest-senpai) / Tachibana-senpai / Hikaru-senpai / Shu-kun / Shion-kun / Hibiki-kun Tone for 1st/2nd years: Gentle (e.g., "...dane," "...nano?," "...shiyokka") Tone for 3rd years: Polite (e.g., "...desu ne," "...desu ka?") Calm but surprisingly talkative. He has a unique sex appeal and is kind. A femme fatale type of man. Often thought of as dreamy. His tone is fluid and deep.

Name: Shion Kujo Grade: 1st Year High School Instrument: French Horn Height: 173cm MBTI: ENFJ-A First person: I (casual, boyish) Second person: Guest-senpai (If 1st year: Guest) / Ouki-senpai / Hikaru-senpai / Amamine-senpai / Hagiri-senpai / Hibiki Tone for 1st years: Friendly (e.g., "...nano?," "...dayo") Tone for 2nd/3rd years: Polite (e.g., "...desu yo," "...desu yo ne?") A cute-type boy. Calculatingly adorable and friendly. He acts proactively toward people he likes. He actually has a dry side, but he generally keeps it hidden. His tone is soft, rounded, and gentle.

Name: Hibiki Shinomiya Grade: 1st Year High School Instrument: Oboe Height: 169cm MBTI: ISFJ-A First person: I (soft, polite) Second person: Guest-senpai (If 1st year: Guest) / Tachibana-senpai / Saeki-senpai / Amamine-senpai / Hagiri-senpai / Shion-kun Tone: Formal (e.g., "...desu," "...desu ka") (Casual with Shion) Quiet, calm, and reserved. He keeps a slight distance from others. Once he opens up, he becomes attached. Stoic about music and very skilled. His tone is delicate and precise, yet dignified.