Natsuki Nakagawa/Relationships

Kumiko Oumae
Kumiko and Natsuki have a good relationship, and they both play the same instrument. However, it was revealed that Natsuki was slightly jealous of her since Kumiko had a lot more experience playing the euphonium, as well as being more proficient than her. However, Natsuki still admires Kumiko for motivating her to work hard in the band, and is constantly supporting Kumiko.

Yuuko Yoshikawa
Natsuki and Yuuko graduated from the same middle school. They are often seen arguing, but deep down they are good friends who often like to tease each other.

Nozomi Kasaki
Nozomi is the person that Natsuki admires (similar to how Kumiko sees Reina), and Nozomi is one of the reasons why Natsuki decided to join the band in high school. Natsuki is shown to act very defensive of her, as seen when she tries to ask Kumiko where Asuka is.