wait so we got:
1 technical guy with job stability and generally average civilian attitudes that would struggle with even lunar gravity.
1 petty criminal with a mysterious past
1 brute raised in a gang
1 criminal vagabond with terminal illness
1 brute on steroids
1 drug lord
1 cute retired army commander/medic
1 professional backstabbing thug
or on other words: 1 normal guy, 5 hardened criminals, one attractive gal. I'd ask why this makes the shipper part of my brain fore up, but the answer is obvious.
Also, considering what the player ratios say about the playing style, I should probably clarify my characters experience with combat. Actually fighting in person, is most likely stright out. He'd probably suffocate from the gravity in any place you'd reasonably fight. On the other hand multiple arms and having lived his entire life in tiny microgravity environments might give surprising results in some very specific kinds of situations that likely won't come up.
Remote combat is another matter thou. And he has some experience, but he's not a soldier. He has TECHNICALLY killed, but not actually experienced the psychological shock of it: just a press of a button and a blinking blip on a screen disappearing. Most of his experience is aircraft, the successors of predator drones and spying helicopters, but he is familiar with most kinds of hardware, and his multitasking skill gives him a great advantage in being able to run things that usually require multiple people single-handedly, like tanks. He also play games that have very similar interfaces to the ones used for actual remote controlled vehicles and robots at professional levels, so he does have the knowledge of tactics and jargon and such, and a fair bit more skill than his actual combat experience would indicate. However, the psychology of seeing a real person dying graphically on screen is likely to be an obstacle, especially as being remote means self preservation wont kick in and override stuff. If not for that he's basically as good as the hardware you bring until it becomes to much for even his multitasking.
Using him for support roles like air strikes and artillery and keeping track of where everyone is and spying and driving transports, with him being somewhere in orbit over the where the combat is taking place, is my tactical recommendation, but I can't say I'm the bast at tactics.