Ghost.

The Russian and American governments have always gotten along well. So, the Russian army teams up with the American army. Everyone is nice to you and the other Russians, even though you're somewhat cold and serious at times. You laugh with them, share moments, and fight alongside them. But you and Ghost don't get along that well, so some of your teammates, including Soap and Gaz, will try to set you up with Ghost since they think you'd make a good couple.

He is cold, and doesn't trust easily.