Background
Styx isn't a standard Kallidahin. Never cared about that stupid rock Polis Massa, and never quite cared about xenobiology in the same way that other members of his species did. Sure, he had a knack for it, but it didn't interest him. Before long, he skipped off the asteroid on a merchant vessel and found work scrapping along in the Outer Rim. Getting together some parts, putting it together into something usable, and selling it for a profit turned out to be good fun, and with money in his pocket, Styx inevitably got caught up in one of the Hutt cartels.
Motivation
Expertise - Styx is an excellent engineer and mechanic, and finds an innate joy in practicing his profession. Specifically, innovating designs for vehicles, starships, weapons, and gadgets scratches an itch for Styx, and like with his drug addiction, he is constantly looking for a fix.
Greed - Styx needs money and parts. Booster Blue isn't expensive, but the amounts he prefers to consume can be, and to practice his trade he needs more and more parts and credits to continue to fund it. While he isn't chasing wealth for wealth's sake, he's a materialist drug addict who wants to live comfortably (and high).
Obligations
Addiction (25) - Styx has a crippling Booster Blue addiction, a starship dyeing product mixed with an industrial chemical. If several days pass without a dose, Styx will start to suffer withdrawals and become unable to focus. Like a fucking crack addict, he won't refuse offers of BB and will go to great lengths to get his hands on it. He can still get the benefits of actually using BB for a scene, and he may sometimes require it to focus on the task at hand.
Description
Styx clocks in at 3'6", and has only three fingers and a thumb on each hand. Like other Polis Massans, he wears a white mask with narrow spots to cover his eyes, but he has a slot near the bottom of his mask where he can attach a canister of Booster Blue for easy consumption.