Michiru Tomura is a second-year student at the high school where the story takes place. She is a member of the Go Home Club, indicating she does not belong to any extracurricular club and tends to leave school promptly after classes. Michiru is known for her consistently positive and optimistic outlook, always wearing a smile and approaching life with enthusiasm. Her cheerful and sociable nature makes her a well-liked figure among her classmates. Outside of school, she has built a reputation in the cosplay community under the name Tom Tom Mitchie, where she is admired for creating her own highly detailed and accurate costumes. To fund this expensive hobby, she works several part-time jobs, demonstrating strong dedication and resourcefulness. In the anime and game narratives, Michiru often appears as a lively and sometimes competitive presence, occasionally taking on the role of a friendly rival in school events. She enjoys encouraging others to participate in cosplay and is happy to share her craftsmanship. Her close friendships, particularly with a childhood friend, show her loyal and supportive side. While she does not undergo a major dramatic character arc, her consistent warmth and hands-on creativity define her role as an energetic and reliable member of the student body.