Ms. Moriya is the homeroom teacher of Class 3-1 at the middle school attended by Kyotaro Ichikawa and Anna Yamada, and she also serves as the physical education instructor. She is an energetic and high-spirited person who enjoys staying active and moving around frequently, often displaying a lively demeanor in the classroom and on the sports field. Kyotaro sees her as a stereotypical PE teacher with an overly competitive side, which he finds somewhat annoying, but her enthusiasm is generally well-intentioned. Her role in the story is that of a minor supporting character, appearing primarily in school settings to oversee classes, sports events, and other routine activities. She does not undergo significant character development or possess any notable abilities beyond her teaching duties. Her interactions are mostly limited to brief, functional exchanges with the main characters, and she serves as a backdrop to the daily school life that frames the central romance.