Sarasa Ryūō is a 17-year-old second-year high school student born on May 1st, making her a Taurus. She hails from Kofu City, Yamanashi Prefecture, and is 160cm tall.

Bubbly, energetic, and enthusiastic, Sarasa works as a senior idol and model. She is a member of the idol unit Ongaku Shōjo and its senior subunit H☆E☆S. Her personality includes strong curiosity and a love for learning new things, alongside notably gluttonous tendencies.

Her interests include identifying high-quality fruits and vegetables during supermarket visits and reading shōnen manga. She distinctly dislikes predictable movie plots, particularly narratives following a "first time you're fooled, second time you realize the truth" structure.

Her theme color is pink, represented by the hex code #E12865. Within her idol activities, her designated musical genre is dance pop.