Background
Imperial Defector:
As many other correlians, Tarren was desperate to get out of the system. And with a need for speed, his natural course of action was to sign up for the Imperial Navy's piloting program. He quickly realized that the program was more about instilling loyalty in the prospective pilots rather than getting them airborn. He kept his head down and learned as much as he could and decided to get out before the pot started to boil. Seeking out other prospective patrons that'd let him fly really fast, he gravitated towards the Alliance after spending a while as a space racer.
Motivation
Conflict - Best of the best
Tarren has a desire to test himself against other pilots, and takes great satisfaction in beating them, be it on the battlefield or in a flightsim.
On the other hand, he's a poor loser, and may be reckless in his attempts to one-up the piloting achievements of others.
He really wants to see if he could blow up a death star.
Too bad there won't be any opportunities for that, right?