Masami Utoku is one of the main characters in the anime series The Rolling Girls. She is known by her superhero alias 'Maccha Green' and serves as the peacekeeper and protector of Tokorozawa. Masami is brave, selfless, and has a strong sense of justice, though she struggles with the pressure of balancing her normal life and her responsibilities as a vigilante. Throughout the series, her actions and leadership greatly influence the story and inspire those around her.