Tiarsis was a Twi'lek businesswoman operating during the era of the Galactic Civil War. Following the Battle of Yavin, she took up residence on Tansarii Point Station, a space station orbiting Ord Mantell within the Bright Jewel system, where she was the proprietor of the local cantina. Consequently, she gained a reputation as the station's most knowledgeable individual. In 1 ABY, a spacer employed by Rydel Delan, Tansarii Point's combat sports promoter, assisted Tiarsis in dealing with a bully who was frightening patrons and causing disruption in her establishment. During this intervention, the spacer uncovered a plot by a group of rebels known as the Genesis Red to sabotage the station. Subsequently, the spacer engaged and overcame the criminals, thereby saving numerous lives on the station.
Tiarsis made an appearance as a non-player character within the 2003 video game Star Wars Galaxies, a massively multiplayer online roleplaying game that was developed by Sony Online Entertainment and distributed by LucasArts, before its termination on December 15, 2011. Tiarsis was incorporated into the game as a component of the "New Player Tutorial," which was introduced alongside the release of "Publish 25," also known as the "New Game Enhancements," on November 15, 2005.