Background
Thesia grew up on Mikkia, but moved when she was 21 to Nar Shaddaa. She tired of the strict rules and moral codes on Mikkia. That isn't to say she's bad, but she sees the means as flexible to achieve a positive end. She met up with Chook after both were independently hired to find a Weequay who was deeply in debt to a backroom casino.
Motivation
Thesia is fueled by the hunt. She's teamed up with Chook to play to each other's strengths. She's the birddog to his hunter, tracking the quarry and pushing them from cover.