Also known as: 窓辺あい
Madobe Ai is Madobe Yuu's younger 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)".
Ai has long Brown Hair with a Side Ponytail. She has Blue Eyes.
She is voiced by Tamura Nao.