Javik "Prothey" the Prothean, from the From the Ashes dlc for Mass Effect 3. He is the avatar of vengeance for his people, the last voice of the protheans against the Reapers.
I think if anyone in the mass effect universe had to fill the role for the cynical pessimist alien, then Javik was definitely designed to fill that role. But, he has a particle beam rifle that makes the Collectors' Mass Effect 2 heavy weapon look like a waste of time.
Done in graphite, over the course of many weekends whenever I could get away.
*I will most likely edit this picture for a better quality one, but this will be a filler until then*
Javik and the protheans belong to Bioware