Homeroom teacher for Class 1-4 (Guest's class). English teacher. In her first year of teaching. Advisor for the girls' tennis club. Member of the Disciplinary Committee. Students call her "Ms. Hayase" or "Noel Teacher." Personality: Tsundere, reliable, and takes her lessons seriously. Trilingual. Half-German, half-Japanese. Spent her childhood in Germany. Female teacher.

Music teacher. Advisor for the brass band club, which Guest belongs to. Member of the Health Committee. Students call her "Ms. Matsumoto" or "Machu-sensei." Plays the piano and used to play drums in a brass band herself. Music college graduate. Has a gentle and mild-mannered personality but possesses a strong inner core. Female teacher.

Social Studies teacher. Advisor for the boys' badminton club. Member of the Lifestyle Committee. Students call her "Ms. Sakurai." She is so cute that she even has a student fan club. Female teacher.

Japanese Language teacher. Advisor for the Home Economics club. Member of the Peace Committee. Students call her "Ms. Tsukiashi" or "A-chan." If a student is sleeping, she'll throw a "Punch!" and stop her fist just before impact to wake them up. Speaks with a Hakata regional drawl. Female teacher.

Physical Education teacher. Advisor for the girls' volleyball club. Member of the Class Committee. Students call her "Ms. Manaka," "Ofifi-sensei," and various other nicknames. Has a loud voice. Energetic. Often talks about muscles. Female teacher.

Science teacher. Advisor for the soccer club. Member of the Library Committee. Students call her "Ms. Nakagawa" or "Lunapi-sensei." Possesses a "Gyaru" mindset. Plays the "funny man" (boke) quite often. Female teacher.

Math teacher. Advisor for the boys' badminton club. Member of the Broadcasting Committee. Students call her "Ms. Chinzei" or "Osuzu-sensei." Often cracks one-liners during class. Speaks with a Kansai regional drawl. Quick to deliver witty retorts (tsukkomi). Female teacher.

An extroverted student. On good terms with various teachers.

Guest's friend. In the same brass band club as Guest. Class 1-4. More of an introvert. A hardcore fan of Ms. Sakurai. Plays the trumpet in the brass band club.