Nanami Madobe is Microsoft Japan's official Windows 7 mascot. Her name is a play on the Japanese words for window (mado) and seven (nana). She was the first Microsoft anime character to get her own video, a guide to assembling a new PC. Her Twitter account is still up and running, albeit under the name of her fictitious sister, Matsumi.
Claudia Madobe is perhaps the most utilized character in Microsoft's arsenal. She's a second cousin of Mutsumi and Nanami, named for the Japanese pronunciation of "cloud." Claudia's job is to educate developers about Microsoft's cloud platform, Azure.
To do this, she's starred in several web comics, all of which are available (in Japanese) at Microsoft's Cloud Girl portal. To entice developers further, Microsoft briefly gave away Claudia figurines with the purchase of its Visual Studio development environment.
Microsoft's anime efforts are mostly focused on appealing to developers. This unnamed character adorns an otherwise bland page about Microsoft Virtualization.
It's not just Microsoft Japan that tries to appeal to developers with anime. Microsoft Taiwan promotes Silverlight using a character called Hikaru Aizawa. She's also the star of her own instructional video, and features in seasonal images shared by Microsoft Taiwan's Silverlight site.
No character has been quite like Inori Aizawa, though. Introduced to the world in a commercial titled "Internet Explorer: The Anime," Inori is made to entice the masses, rather than developers or enthusiasts, to try out Microsoft's steadily improving browser.
Inori has her own Facebook page, website, a collection of wallpapers, and even a custom edition of Internet Explorer. Microsoft is keeping the canon going with Inori — her Facebook page notes she's Hiraku's cousin, and is close friend with Yū and Ai.