Tristan Pex was a man of Human descent. After the Clone Wars concluded, he departed from Chandrila, enlisting with the Benelex Guild and embarking on a career as a bounty hunter.
During the time of the Galactic Civil War, after being away for twelve years, he made his way back to his planet of origin, intending to leave his previous occupation as a hired killer in the past. His assumption was that Chandrila would offer refuge from the enemies he'd made while with the guild, most notably the infamous Malkite Poisoners. He took a position as an administrative assistant and close protection officer for Jovive Centi, the governor of Chandrila, shielding her from both anarchists and political rivals. In the end, he met his demise via a poisoned dagger, under the impression that he was preventing an attack on Centi's life. However, the assassin was actually Ratambo Gale, a member of the Malkite Poisoners who had been pursuing Pex relentlessly.