Robbidon's father, Grahlt Jaas, was a talented engineer and pilot working in the Republic shipyards near Insert Planet Here, sometimes on projects of a highly-sensitive nature. Robbidon lived with his mother at a settlement nearby and is father would come home for long visits in between assignments. During these times, Grahlt would spend his time mentoring his son in the fundamentals of his profession, and overall, the family was comfortable and happy.
However, when Robbidon was in his early teens, word came that his father had been branded a traitor to the Republic and had been executed. No further details were explained though Robbidon's mother, Hanali, tried in vain to learn what exactly had happened. What was made immediately clear was that the family had no claim or right to any sort of pension, and within a few months, Robbidon and his mother had lost nearly everything.
To make matters worse, the Robbidon's mother grew ill, and over time,without proper treatment, eventually died.
Robbidon did the best he could to survive, picking up what skills and tool of the trade he could, bouncing around the galaxy with an eye always aimed toward solving the mystery of what exactly had happened with his father.
Along the way, Robbidon encounters/buys/and-or rescues a modified LE Series Repair Droid, and the two develop a good-natured, bantering working relationship...
Or something like that...