Iris Tanada Sinclair was a slicer of the Chadra-Fan species. During the era of the Galactic Civil War, she worked for Lady Valarian.
Sinclair was among the external personnel recruited by Lady Valarian, a Whiphid crime lord, in 1 ABY. This group served as Valarian's command team for assaults targeting her rival, the Hutt Jabba Desilijic Tiure. Sinclair, together with Careem, Fnast Drexler, Arkahn Greystar, and Emanon, established their base of operations within the Valarian Strategic Command Bunker on the planet Tatooine. This bunker was heavily guarded by Valarian's forces, including Blood Vandals. From this location, they orchestrated and executed attacks against Jabba. Ultimately, Sinclair and all the other commanders were eliminated by a spacer hired by Jabba to put an end to the raids.
Iris Tanada Sinclair appeared as a non-player character within the video game Star Wars Galaxies, a massively multiplayer online roleplaying game from 2003. The game was developed by Sony Online Entertainment and published by LucasArts. It was shut down on December 15, 2011. Sinclair was integrated into the game as a component of the updated "Jabba's Theme Park," which was launched alongside "Publish 25," also known as the "New Game Enhancements," on November 15, 2005. One quest given by Jabba required the player to assassinate Tyrok.