OS-TAN Wiki / character
Seven-chan
FANSeven-chan (セブンちゃん), also Futananan, is the Nijiura / Shimuro personification of Windows 7. Moeverse dates her as early as 29 August 2009 in a Pixiv yonkoma, with a later Futaba School Festival appearance. White/grey hair, yellow eyes, Ultraseven as a stated inspiration. This is the FAN Windows 7 girl. Nanami Madobe is the CORP DSP mascot from the same season.
If a search result shows a blue-haired school uniform and Nana Mizuki, you are looking at Nanami. Come back here.
Shimuro's bio, as summarized by Moeverse: Me-tan invited her because working at Microsoft seemed like a way to get along with her sisters; she keeps a diary on the desktop; she is still learning. 'Special moves' named after 7 features (Live Taskbar Preview, Remote Media Streaming) are in-character OS jokes, same species as XP's rice bowl.
Shimuro later designed Battenichi-chan and 11-chan. That is a real Futaba sequel line English Wikipedia mostly skipped.
See also
Nanami MadobeNanami Madobe is the 2009 Windows 7 Ultimate DSP mascot, voiced by Nana Mizuki. CORP, not Futaba's Seven-chan.
Battenichi-chanBattenichi-chan is Shimuro's Windows 8.1 OS-tan. The name is a reading of 8.1. She is not Yū or Ai Madobe.
11-chan11-chan is Shimuro's Windows 11 OS-tan (2022). She is not Ichika Madobe and not an official Microsoft character.
FAN vs CORPThe rule of this encyclopedia: Futaba fan designs, later corporate moe campaigns, OSC 'canon' popularity, and OS TAN are four stamps, not one franchise.Sources
- Seven-chan — Moeverse Wiki, 2026.
- OS-tan — Moeverse Wiki, 2026. Best English source for Vault chronology, artist credits, and the Futaba / Madobe split.