Fenn Kay'lay was a Bothan female who existed during the Galactic Civil War era. After the Battle of Yavin at some point, Kay'lay found herself on the world of Dathomir, where an accident occurred at the Imperial Research and Prison Facility. As a result, Fenn Kay'lay contracted the Blackwing virus, transforming her into an undead being. A spacer later eliminated her reanimated body within the Quarantine Zone.
Within the 2003 Star Wars Galaxies video game, Fenn Kay'lay appeared as a non-player character. This massively multiplayer online roleplaying game was created by Sony Online Entertainment and published by LucasArts before its servers shut down on December 15, 2011. The "Game Update 14," which went live on October 12, 2009, introduced Fenn Kay'lay to the game. She functioned as one of the Undead boss enemies inside the Quarantine Zone, whom players were required to defeat in order to finish a collection.