Hibike! Euphonium Wiki

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Hibike! Euphonium Wiki

Hazuki Katou (加藤 葉月 Katō Hazuki) is one of the main characters of Sound! Euphonium series.

She is Kumiko Oumae's classmate who looks a bit suntanned because she belonged to the tennis team when she was a junior high school student. She plays the tuba in Kitauji High School Concert Band.


Hazuki has the appearance of a young girl with short straight brown hair that curls at the bottom, and is decorated with a red-pinkish hair clip. She has gold-hazel eyes.

She wears the normal Kitauji High School female student uniform for first-year students.


Hazuki is a bright and perky mood-maker, who is also very energetic and cheerful. She is almost always seen with a smile on her face, and can quickly become familiar with people, which is seen in Episode 1 when she refers to Kumiko Oumae as "Kumiko-chan", even though she just met her. She is also a friendly girl who talks innocently, and she is the type of person who prefers standing out to supporting others.


Hazuki was on the tennis team in junior high school, and is a beginner in music. She joined the concert band as she admired the trumpet, but ends up playing the tuba.


Hazuki makes her first appearance in Welcome, High School, where she becomes one of Kumiko Oumae's first friends upon entering Kitauji High School. Just after meeting Kumiko, she starts calling her by her first name and telling her to do the same thing with her too, which quite shocks Kumiko.




Title Role
Sound! Euphonium Main
Sound! Euphonium 2 Secondary
Sound! Euphonium The Movie: Welcome To The Kitauji High School Concert Band Main
Sound! Euphonium The Movie: May The Melody Reach You! Main
Liz and the Blue Bird Minor
Sound! Euphonium: The Movie - Our Promise: A Brand New Day Main


  • The name Hazuki means "leaf, plane, lobe, needle, blade, spear, counter for flat things, fragment, piece" (葉) (ha) and "moon" (月) (tsuki/zuki).
    • Hadzuki/Hazuki (葉月) is the traditional name for August, meaning "month of leaves", with the older form of it being 葉落ち月 (haochidzuki/haochizuki, はおちづき) which means "month of falling leaves". Hazuki is the old Japanese word for the month of August.
      • It is also used as a Japanese surname.
  • Hazuki's surname Katou means "add, increase" (加) (ka) and "wisteria" (藤) (tou).


  • Even though Hazuki has the same surname as Miki Katou, they both have no familial relation with each other.
  • According to the official Sound! Euphonium novel website:
    • Hazuki's favorite colors are yellow and orange.
    • Hazuki's hobby is playing tennis.
    • Hazuki's special skill is having done karate when she was small.
  • Riko Nagase often encourages Hazuki to do her best.
  • In the novel, Hazuki, Kumiko Oumae and Midori are all in Year 1, Class 3.
  • Hazuki is from Higashichu Lower School, according to the novel series.
  • In the novels, Hazuki is portrayed differently in several aspects:
    • She dyed her hair.
    • She has/had a trumpet charm on her bookbag.
    • She is said to be athletic because she was tan.
    • She originally wanted to play the trumpet before picking up the tuba.
  • Hazuki's homeroom teacher is Michie Matsumoto.
  • Hazuki's tuba is based on the Yamaha YBB-641 model.