Sawa Sugimoto attends Kouka School of Musical and Theatrical Arts as a preparatory student in its prestigious Centennial Class, having achieved the highest entrance examination score due to her exceptional academic and artistic talents. Her background features extensive ballet training, yet she deliberately abandoned a potential career as a prima ballerina to pursue opera at Kouka, driven by her ambition to perform male roles after being inspired by a star in the Kouka Revue. This choice underscores her deep devotion to the school as a dedicated Kouka otaku.

As the committee chairperson for her class, Sawa displays a calm and dependable demeanor, guiding peers and upholding order with her responsible nature. She possesses striking purple eyes and long purple hair, typically tied in a ponytail with blunt bangs, and wears the standard school uniform. Her birthday falls on December 20th, aligning her with the Sagittarius zodiac sign.

Her journey at Kouka involves adapting ballet-honed skills to opera techniques, marked by a focused rivalry with Sarasa Watanabe as they compete for roles. Despite this, she remains steadfast in mastering otokoyaku. Sawa contributes to the school's musical activities, performing the ending theme "Shinayaka Na Mirai" alongside classmate Ayako Yamada in select episodes. Admitted as a first-year high school student, she stands among the youngest in her cohort, highlighting her disciplined commitment to rigorous training and her methodical approach to male-role acting.