Alongside her natural beautiful appearance, Runa is a fashionable student and is shown as a kind and positive girl, even though she is surrounded by disinformation told by her classmates. She pursues acquiring more guidance from her friend to be a better girlfriend for Ryuuto as well as for others. She also suffers from the trauma that she succumbed to when she was younger.
Runa from the anime you were experienced I was not: our dating story 
She is a famous female high school student 