TV-Series
Description
Mayu Kuroe is a supporting character who appears as a third-year transfer student at Kitauji High School during the events of Sound! Euphonium 3. She joins the school's concert band as a euphonium player, having previously attended Seira Girls' High School in Fukuoka, a prestigious institution known for its top-level wind ensemble that consistently earned national gold medals. This background marks her as an exceptionally skilled musician from the moment she arrives.

In terms of appearance, Mayu is a short teenage girl with long, straight light brown hair and bright turquoise eyes. She exudes a gentle, soft, and almost angelic presence, and her demeanor matches that impression: she is calm, quiet, outwardly friendly, and caring. However, she tends to keep a respectful distance from others and avoids being the center of attention. She has a preference for transparency and is not fond of modern technology; her hobby is photography, and she uses a film camera gifted by her father, particularly enjoying the color quality of film over digital. She does not like to appear in her own pictures. Another club member once compared her to a jellyfish—pretty from a distance but capable of a sting if approached too closely.

Mayu's motivation in the story is shaped by her desire not to become a burden or a source of conflict. She frequently worries about the implications of playing the same instrument as the protagonist, Kumiko Oumae, and repeatedly asks whether she should forfeit solos or step aside. This reflects a deep-seated wish to let the band enjoy itself without tension. She values playing together with others more than winning a solo part, and she does not play halfheartedly; despite her reserved nature, she is deeply passionate about music.

Her role in the narrative centers on being a catalyst for both musical and interpersonal challenges. As a new member who is undeniably talented, she creates an implicit rivalry with Kumiko for the euphonium solo, a conflict that forces the band to confront issues of fairness, merit, and personal feelings. Mayu navigates these tensions with a neutral stance, believing the club should be a place of enjoyment for everyone. At the practice camp, she earns the euphonium-trompete solo after a second audition, which causes her concern about Kumiko's feelings. Later, before the national competition, she openly discusses their emotions with Kumiko, affirming that the experience of playing together matters more to her than securing the solo. She ultimately wins the solo by a single vote, and her heartfelt performance contributes to the band's emotional gold award, leaving her relieved and happy alongside her friends.

Key relationships include her quick friendship with Kumiko, Hazuki Katou, Midori, and Tsubame Kamaya. She forms a particularly close bond with Tsubame, who reassures her during moments of doubt. Her interactions with Kumiko are central to the season's thematic exploration of competition, self-doubt, and mutual respect. Another character, Kanade, is described as being wary of her, while Mayu remains consistently kind and non-confrontational.

Developmentally, Mayu begins as a self-effacing transfer student who avoids drawing attention and struggles with guilt over her ability. Over time, she becomes more comfortable asserting her place in the band, learns to trust that her presence is welcomed, and slowly opens up to her peers. Her journey culminates in a shared moment of triumph at nationals, where she feels happiness not just for the award but for having genuinely connected with the group.

Notable abilities beyond her technical proficiency on the euphonium include her perceptiveness and her capacity to defuse tension through quiet understanding. She owns a silver YEP-621S euphonium, reflecting her serious commitment to the instrument. Her past at a powerhouse school means she is accustomed to a high level of performance, yet she never flaunts it. She also has a talent for photography, which she uses to capture moments of her friends rather than herself.