Mr. Eff You Man

Quote shamelessly stolen from a piece ~aureath did that was too appropriate not to use.
Title stolen from Eddie Murphy. (If you get the joke, you're awesome).

Nikodemaus Metavolt aka Niko. Hunter. Inventor. Douche bag. He's snarky, hardly ever sleeps, and chain smokes like a train. He specializes in cybernetics, robotics, and being awkwardly aloof.

Due to an accident in Outland, he lost his left arm, though with the help of his field medic/surgeon twin sister, was able to replace it with a robotic limb. Unfortunately, the synthetic "blood" he developed to make it function with the rest of his body is literally poison in his veins. It causes border line narcolepsy, short temper, lethargy, tingling of the skin, and a slew of other side effects, like the weird veins on his shoulder and the intense color of his eyes.

Oh, and swelling of the genitals. That, and the fact it actually makes the arm work, are the only pros. He smokes a special blend of herbs and takes medicine made by his sister to keep the side effects to a tolerable level.

He enjoys experimenting with cybernetics (on animals or people, whatever is available), bugs, math, sleeping, and being a huge dick who inwardly just wants to be loved.

Or...just be a dick.