Masako is a teenage girl with straight shoulder-length black hair that has a ribbon tied in the back and olive-green eyes.
Masako is a very friendly and cheerful girl who loves music that she is happiest during performances.
- The name Masako means "ten thousand" (万) (ma), "thread, silk" (紗) (sa) and "child" (子) (ko).
- Masako's surname Sakai means "border, boundary" (堺).
- Masako's music doctorate covers all genres of music.
|Kitauji High School Concert Band during Kumiko Oumae's first year|
|Note: Section leaders are shown in bold text
1Rejoined the band
2Left the band
3Also in charge of the Tuba and Double Bass sections
|Kitauji High School Concert Band during Kumiko Oumae's second year|
|Note: Section leaders are shown in bold text|