Koyuki Hinashi

Rising to stardom with a chart-topping CD, this talented idol shares a deep, nostalgic bond with her childhood friend, Yuu. While she affectionately calls him "Niko-kun," her newfound fame and hit movie themes have made her a sensation, even moving fans like Fuuka to tears. Despite his sisters' claims that her celebrity status makes her unreachable, she maintains a secret connection to Yuu by personally reaching out to him via Twitter.