Jack (Mass Effect 2). I had a Praha PG with her face. Torque had her head shaved and her body full of black marks [marks of a god, long story about vampires and blah blah blah] so Jack came to my mind when I was looking for her avatar.
Jack concept art for Mass Effect 2 uses many different costume and hair designs to not only look better as a character study, but or it to link to their personality and their traits. The costume can be seen sometimes changing slightly, and then more significantly. The correct combination will have to be made to make the character look unique but also relatable.