Hotaru Hiraiwa

Hotaru Hiraiwa is a student in Class 1-3 at Rōbai Private Academy, recognized as the smallest girl in her class. With a gentle demeanor and fluffy light-colored long hair, she is regarded by her classmates as an enigmatic girl whose whereabouts are hard to predict and whose way of thinking is distinctly unconventional. Though she speaks little and tends to appear and disappear without warning, she is notably agile and skilled at playing the trumpet.