Takahata Rumi⚥

The president of Eiji's class. A bright, high-spirited and popular girl, her father is a newly rich self-made man and her family is tremendously wealthy. Thanks to her personality this upper class "princess" status of hers doesn't particularly show, though. Born as a futanari, she got over her dislike for her body at an early age and came to be curious about all things sexual. With Natsuki as a partner she's been researching her sexuality almost nightly in the school infirmary. While already fully sexually experienced, she is constantly in search of further stimulus and pleasure. While Rumi is a naturally effervescent and outspoken co-ed, she can at times be particularly authoritative, sadistic and intolerant, especially during group activities.

[From J-List and Wikipedia]