Brax, a sergeant, served with Raven Squad, which was a Special Forces group within the Sith Empire. This unit was active on Ossus during the time of the Invasion of Ossus. While performing reconnaissance for Major Anri, Brax identified an Imperial resupply point, but before he could get to it, he was ambushed and suppressed by enemy Mutated Geonosians.
The character of Brax is initially seen in the Jedi Under Siege content update for the game Star Wars: The Old Republic.
Within the Imperial narrative, Brax withdrew to a close by cavern. Major Anri, along with the Alliance Commander found him there and extracted him. Following Brax's enthusiastic reaction to encountering the renowned Commander, Anri instructed him to go back to base to receive medical attention for his injuries.
During the Onslaught expansion, should the player be playing as a Republic Saboteur, Anri will shout Brax's name on Mek-Sha if the Commander eliminates Vice Admiral Dol Narlock, inquiring as to whether he is still alive. Consequently, his final destiny is left ambiguous.