Ueshiro Rena

Track star and protagonist sister, a New Track Hope who is a candidate to win a medal. Raised in a girls' school, she has a good appearance and behaves like a young lady when she is on TV. However,in her insides, she'is capricious with a cat-like personality}, she is the domineering type pushing the protagonist around and usually getting her way. Seen as one of the most elite athlete is looked up to by other professional athletes.

Rena loves to tease Kazuki, she usually flashes him her boobs and flirts with him.

"Give up!. My little brother has seen me naked since he was born... Fufu ♪"