A reclusive deserter from the Garlean army, Luc spends his days on the edge of the Sagolii desert, working on his next big idea. Good with his hands and mechanically brilliant, he always has a new idea for how to improve this and optimize that. There's no specific reason behind it--he just enjoys doing it.
However, the reclusiveness combined with years of clawing his way through the ranks to that coveted jen has left him with very poor social skills. He's blunt bordering on rude, and doesn't feel particularly comfortable dealing with emotions. He also has a habit of getting lost in his own thoughts and work to the point that he tunes out everything else around him. This often results in odd situations, such as walking into doorframes and putting things that aren't food into his mouth before he realizes what he's holding.