Pex appeared as a non-player character (NPC) in the 2003 video game Star Wars Galaxies, a massively multiplayer online roleplaying game developed by Sony Online Entertainment and published by LucasArts, prior to its closure on December 15, 2011. Pex was added to the game as part of the Storyteller system, introduced with the release of the "Chapter 6" update, on May 22, 2007. The developers of the game added a small chance for every generic storyteller vendor NPC (who sold props for players to use in self-created events) to spawn with the name Pex. This Pex originally had a random appearance that was different from the generic storyteller vendor NPC. This random appearance was later changed to a zombie version of the standard storyteller vendor.
This NPC was added as a tribute to Jason "Pex" Ryan, who was the events manager of Star Wars Galaxies from August 2003 to May 2008. He organized and supported many in-game events, often playing famous characters like Princess Leia or Darth Vader at such events.