Master Firwirrung was the lead entechment specialist on board the Ssi-ruuk ship Shriwirr and the master of the human Dev Sibwarra in Star Wars: The Truce at Bakura.
Along with Elder Sh'tk'ith, Firwirrung studied Dev since the human's capture. Dev had Force abilities and the Jedi, Luke Skywalker, managed to free Dev of his brainwashed state. Luke was then captured by Firwirrung and other Ssi-ruuk and taken to the Shriwirr. However, Luke managed to escape with Dev and captured the Shriwirr while it was under fire. It was during the attack on the ship that Firwirrung was killed.