The Filar-Nitzan represented a sentient species located within the galaxy. During the High Republic Era, the Jedi Master Nubarron, whose appearance resembled a pink-and-purple cloud illuminated by lightning, declined to reveal their species, which prompted assumptions that they belonged to a previously undiscovered group of Filar-Nitzan.
In 231 BBY, Jedi Knight Vernestra Rwoh of the Mirialan race, while conversing with the Jedi Master at the Starlight Beacon space station, internally reflected on the speculations surrounding Nubarron's species, including the possibility of them being from an unknown Filar-Nitzan lineage.
Within current Star Wars canon, the Filar-Nitzan were referenced in the 2021 novel The High Republic: Out of the Shadows by Justina Ireland. This novel was a contribution to Phase I of the Star Wars: The High Republic multimedia project. Conversely, in the Star Wars Legends continuity, the Filar-Nitzan initially appeared in the 1995 Alliance Intelligence Reports sourcebook for the West End Games roleplaying game, where they were depicted as a gaseous sentient species.