Aya Kusanagi appears in the 1990 anime "Eiji" as a secondary character. A high school student and musician, she plays guitar in a band. Her significance arises from being the younger sister of Naoya Kusanagi, the reigning local boxing champion. This familial connection directly impacts protagonist Eiji Akagi. Despite his family's boxing background, Eiji initially dislikes the sport. His encounter with Aya sparks a pivotal shift, unexpectedly igniting his interest in boxing.