Also known as: 窓辺ゆう
Madobe Yuu is Madobe Ai's older sister. They are Mascots for Windows 8 and second cousins to Nanami. If you put their first names together, you get "yuuai (friendship)" or "UI (user interface)".
Yuu has short Brown Hair with Short Twintails. She has Blue Eyes.
She is voiced by Nishi Asuka.