Eiko is a supporting character in PriPara who shows up as a background presence during performances, especially cheering on Laala and Mirei. She's best known for her enthusiastic personality—she became Laala's self-proclaimed number one fan after just two stage appearances, which says a lot about how quickly she bonds with people. That said, she's the type to get discouraged just as easily.
Visually, she's got short, slightly curled red hair that falls to her shoulders, dark green eyes, and a yellow candy hair barrette. Her overall aesthetic—the candy-themed accessories and pop clothing style—suggests she's aligned with the Candy Alamode brand. Unlike some characters, her everyday look doesn't really differ from her idol appearance. Her school uniform is fairly standard: pale blue shirt with white collar, blue bow, and white skirt. When she's playing tennis, she ties her hair up and switches to an orange skirt and white top.
She plays tennis as her main hobby and is notably the first character in the PriPara franchise who doesn't attend Paprika Private Academy, making her an outlier in that sense. She's also the third red-headed character in the Pretty Rhythm/PriPara series overall, following Aira Harune and Bell Renjouji.
Content compiled by AnimeList.moe from publicly available sources.