Megumi Mita is a young schoolgirl at Aikoh Academy training in its rhythmic gymnastics club, sharing Olympic aspirations with peers like Hikari Kamijo and Hazuki Shiina. Her significant gymnastic talent captivates audiences, with routines described as making "people want to spin, twirl, and dance."

Possessive and occasionally dislikeable, Megumi exhibits a fiercely competitive and determined nature. She openly antagonizes Hikari, relishing her rival’s struggles or failures during performances. This animosity drives her primary goal: defeating Hikari in every competition they enter. Her behavior aligns with the "Alpha Bitch" and "Insufferable Genius" tropes, showcasing abrasive brilliance.

Across the series, Megumi evolves beyond initial hostility. While retaining her competitive drive, she secretly develops admiration for Hikari’s abilities, eventually recognizing her as a serious threat in Olympic qualifiers. This culminates in Megumi openly applauding Hikari’s performance and admitting respect, marking a shift from rivalry to acknowledged admiration by the anime’s conclusion.