Tsune Watanabe (渡辺 つね Watanabe Tsune) is a third-year student at Kitauji High School in the main series, a member of the concert band who plays the flute, and the band's alumni coordinator.
Tsune is a teenage girl with an average build. She has wavy chest-length light-brown hair, that has a braid on her right where it is tied across her head by two pink heart pins; burgundy-colored eyes and very thin eyebrows.
She is usually seen with a normal Kitauji High School uniform for female third-year students.
Not much is known about Tsune's personality.
Tsune seems to be friends with Kotoko Himegami.
- The name Tsune means "always" (つね).
- Tsune's surname Watanabe means "transit, ford, ferry, cross, import, deliver, diameter, migrate" (渡) (wataru) and "environs, boundary, border, vicinity" (辺) (be).
- Watanabe is is a common surname in Japan.
- Tsune's nickname is "Chabudai", meaning a low dining table for things like tea.
|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