Koharu Nanakura  

, 七倉 小春

Four Star Academy is where both Koharu and her friend Yume applied. Although they are not in the same class, they share a room together. Despite their contrasting personalities - Koharu being quiet and delicate while Yume is energetic and curious - they remain close friends. Koharu was drawn to the elegant and beautiful Yozora after she assisted her when her glasses fell off. This admiration led Koharu to join the Moon Beauty class, where Yozora taught.