Gears of war series question.?

Each one has a campaign that's about 20-30 hours long. The online play kept me entertained for a few months. In co-op the 1st player plays as Marcus and the second plays as Dom. You never see carmines face. I'm pretty sure the co-op situation is the same in both. Carmine in gears 1 is kind of a doofus, and in the second one we meet another carmine who is related to the first and is even more of a doofus because he is a new recruit.