XP-tan

XP-tan is a character from OS-tan. She is the personification of Windows XP operating system.

Name
XP-tan's nickname "Saseko" corresponds to the kana syllables "Sa" and "Se", which on a Japanese keyboard are on the "X" and "P" keys, with the "Ko" at the end of her name being a common ending for female Japanese names.

Appearance
XP-tan is depicted as a dark-haired girl with ribbons in her hair and the XP hair ornament worn on the left side (infrequently, she is depicted with ornaments on both sides). As Windows XP was originally criticized for bloating a system and being very pretty without being equally as useful, she wears tight clothing and has big breasts. An early alternate outfit was especially skimpy, wearing a blue miniskirt, high-heeled shoes, and a midriff-bearing tube top with "XP" on the breasts. She usually dresses in a blue and white stylized schoolgirl outfit with ribbons and detached sleeves for decoration.

Personality
XP-tan is often portrayed as shallow and promiscuous; the latter may reference not just the eye candy interface, but also the large number of security exploits XP had early in its lifetime.

OS-tan
In early depictions, there is a strip where 2k-tan derides XP-tan and calls her an "Activation Whore" since XP required activation over the phone or internet to set up; this was a change in Windows that was widely criticized at the time. She generally fills the role in the manga as the typical eye candy character, but alternate interpretations may be starting to change this.

In Deja Vu's doujin, XP-tan is seen as a somewhat dense but undeniably beautiful and envied character, easily compared to Mikuru Asahina from Suzumiya Haruhi no Yūutsu. She has had the most hentai scenes out of any of the OSes, much due to her large breasts, often drawn comically huge. However, her characteristically large breasts are envied by most other characters.

XP-tan is somewhat involved in the Homeo saga, playing a minor role as a foil to Homeko.

In the expanded universe, she is one of the most diplomatic Windows-tans, and has worked side-by-side with Mac OSX Tiger-tan and Leopard-tan in bootcamp. She is more open-minded than most of the older Windows-tans, and wants to ensure harmony between the Windows and Mac families.

Trivia

 * As Windows XP used up large amounts of memory for its time, XP-tan is often seen eating or holding an empty bowl labeled "Memory".