Mutsuki Shimazu  

, 島津 むつき

The assistant on the Tokyo Metropolitan Miyake Girls High Schools sidecar racing team, who works behind the scenes to support her teammates. She focuses on maintaining the machines of Yuri and Megumi, ensuring they are always ready for competition. Despite being unseen by many, she is dedicated and hardworking. Her demeanor is calm and collected, reflecting her professionalism in this high-pressure environment.