Kaori Nakaseko (中世古 香織 Nakaseko Kaori ) is a supporting character in the Hibike! Euphonium series and a member of the concert band. She is a third-year student who plays trumpet. In the Kitauji Concert Band, she is the trumpet section leader and the band accountant.
Kaori is a young girl, who wears the standard Kitauji High School uniform for third year students. She has short, bobbed, dark-brown hair, and matching brown-reddish eyes. Underneath her left eye is a beauty mark.
Kaori is considered to be popular and well liked among the members of the band, and has a soft tone in her voice and a gentle demeanor.
- In the light novel, she is noted to look very alike to Reina.
- Yuuko is shown to be obsessed with Kaori, even getting defensive about her playing the Crescent Moon Dance trumpet solo