Microsoft Silverlight

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Hikaru Aizawa Profile.jpg
Character information
Common name: Aizawa
Also known as:
First appearance: 27 September 2010
Hair color:
Eye color:
OS-tan Annex Project Faction: Windows Family
Lineage: WinNT
Technical information
System Personified: Microsoft Silverlight
Developer: Microsoft Corporation
Debut: 27 September 2009
Latest Release: 5.x

The Aizawa family are the official mascots of Microsoft Silverlight (in Taiwan). Inspired by the popularity of Nanami and the Bing girls, in late 2010 Microsoft Taiwan created Aizawa Hikaru, an official anime mascot for their Silverlight program. After Hikaru's popularity not only in Taiwan, but in other countries as well, they debuted her 3 sisters later in the same year. A picture of them can be seen here.

Aizawa Hikaru

The first of the Silverlight girls, Hikaru spawned a massive outpouring of artwork, fan work, and other things, as well as her sisters. She has long blonde hair, held with 2 blue ribbons on either side, and blue eyes. She is the youngest of the girls.

  • Blood Type: B
  • Birthday: September 27th (Libra)
  • Height: 158 cm (5' 2")
  • Weight: 42 kg (92 ½ lbs)
  • Hobbies: Singing, Dancing, Listening to Music
  • Favourite Foods: Sweets, Roasted Meat, Chinese New Year's Cake and Red Bean Soup
  • Least Favourite Foods: Spicy Food and Nattō (Fermented Soybeans)

Aizawa Lei

The second Silverlight girl, she is younger in appearance than Hikaru, but is actually the second-youngest. She has long white hair with a lacy goth-loli bow, similar to Windows 3.1. Her name is sometimes spelled "Rei".

  • Bloodtype: AB
  • Birthday: July 10 (Cancer)
  • Height: 150cm (4' 11")
  • Weight: 40kg (88 lbs)
  • Hobbies: Making handcrafts, watching movies
  • Favourite Foods: Strawberry cakes, Xiaolongbao (Chinese Steamed Buns) and Takoyaki (Japanese Fried Octopus Pancake Balls)

Least Favourite Foods: Bitter Melon and Spinach

Aizawa Aoi

The third Silverlight girl, she looks to be in her late teens, with a mop of black hair on her head and blue eyes.

  • Blood Type: O
  • Birthday: November 12th (Scorpio)
  • Height: 160 cm (5' 3")
  • Weight: 43 kg (94 ½ lbs)

Aizawa Yuu

The fourth Silverlight girl, Yuu is the eldest of the sisters, and seems to be in college. She has a sweet, carefree demeanor.

  • Blood Type: A
  • Birthday: April 30th (Taurus)
  • Height: 165 cm (5' 5")
  • Weight: 45 kg (99 lbs)
  • Hobbies: Reading, Writing
  • Favourite Foods: Fruits, Beef Noodle Soup, Fruit Pie
  • Least Favourite Foods: Mushrooms, Green Spring Onion (Scallions)


The girls' popularity sparked their own website off of Microsoft Taiwan's Silverlight page. Their site is filled with free wallpapers, which in turn inspired an outpouring of artwork from the community. The positive feedback has inspired other things involving the girls, including a desktop gadget and a visual novel. There is even a promotional video featuring Hikaru, in the same way as the Windows 7 promotional video featuring Nanami. The girls' website is here.