Leon Kovalski, who would later be known as subject 24, worked as a manual laborer and resided on Tatooine while the Galactic Civil War raged on. By the time the Battle of Yavin occurred, Kovalski was abducted by agents working for the White Thranta Shipping Company to be used as a guinea pig in horrible and immoral medical trials. The majority of these "subjects" perished as a result of the experiments.
The character Leon Kovalski was referenced in the 2003 video game Star Wars Galaxies, a massively multiplayer online roleplaying game that was created by Sony Online Entertainment and brought to market by LucasArts, before it was shut down on December 15, 2011. Leon Kovalski became a part of the game within the "Legacy Quest" when "Publish 25," also known as the "New Game Enhancements," was released on November 15, 2005.