Movie
Description
Yūko Yoshikawa plays trumpet in the Kitauji High School concert band during Kumiko Oumae's first year. She ascends to band president and drum major in Kumiko's second year. Her appearance is youthful, featuring shoulder-length dirty-blond hair with square bangs, light-bluish-green eyes, and a frequent pale-yellow bow headband worn with the standard school uniform. She stands 156 cm tall and was born on April 15.

Her personality is friendly, cheerful, confident, and determined, expressing thoughts openly. She forms strong attachments, displaying deep admiration and protectiveness toward her senior, Kaori Nakaseko. This loyalty sometimes triggers emotional outbursts or aggressive behavior toward perceived threats to Kaori, like Reina Kousaka, especially when Reina secures a trumpet solo over Kaori. Acknowledging her own flaws, including quick anger and stubbornness, she works to overcome them for the band.

During her second year, she actively supports Kaori, inviting her to walk home and defending her during the audition controversy. She circulates rumors about potential bias favoring Reina and publicly confronts band advisor Noboru Taki despite Kaori's request not to escalate. Later, she bows to Reina, pleading for her to withdraw from the solo audition to give Kaori a final chance, but Reina declines. After Kaori concedes the solo, Yūko breaks down crying before eventually reconciling with Reina.

In her third year as president, she maintains a close friendship with Natsuki Nakagawa, evolving from initial friction to accepting Natsuki's teasing as affection. She supports Mizore Yoroizuka during conflicts with Nozomi Kasaki, helping locate Mizore when she runs away and facilitating their reconciliation. During competitions, she motivates the band, leading gestures to affirm their goal of reaching nationals. She also shows concern for Reina's troubled trumpet playing, offering support.

Her band activities include performing at the Sunrise Festival and Kansai competition, expressing joy upon winning gold. She participates in social outings, visiting a pool with friends and attending the school festival where Natsuki pranks her with an oversized cake. During Asuka Tanaka's potential resignation crisis, she acts as the band's voice seeking clarification from Taki and reassures the band president of collective support.

Her development shows progression from intense protectiveness of Kaori toward greater maturity, admitting Reina deserved the solo and prioritizing band unity. Relationships demonstrate growth through reconciling with Reina and deepening bonds with Natsuki and Mizore. Leadership qualities emerge in resolving conflicts and maintaining morale.

In the Asuka Tanaka-focused recap film, Yūko appears in band activities preparing for nationals, including the training camp and a train station performance. She participates in addressing Asuka's potential resignation and supports the band through this challenge.