Yuuko is Sorata's younger sister.
Yuuko is created by Hajime Kamoshida as a minor character in the Pet Girl of Sakura Hall franchise. She is voiced by Yui Ogura.
She is a small girl who has a yellow bow in her short, brown hair. She has a short, ponytail that does not extend past her nape.
Like Aoyama, she tends to misunderstand things, and she gets jealous when she sees Nanami or Shiina close to her big brother. She is self conscious about her small breasts.