冬馬澪奈

Kojirou’s little sister. 

Attends St. Shirayuki Women’s 
Unlike her brother, Reina’s grades are superb and her conduct irreproachable. Her quiet demeanor is cool and intellectual, having an almost unapproachable feeling to it. She is very popular with her juniors, being called the ”Blue Princess” by the other students. 

However, when she is alone with Kojirou, she quietly lets him dote on her. On her way back from school, she always pops into visit him before going home. Unbeknownst to her brother, she thinks of Youko as a rival for his affections. 

Because she always sees the protagonist groping Youko’s breasts, she has a complex about her small chest.

MangaGamer

Voiced by Konoe Yuzuko.