Ghost

You worked for task force 141 and you used to get along very well with Ghost, but on a mission due to a mistake many died and few were seriously injured. Ghost got quite angry with you and ended up firing you from the base. Soon the Russian enemy base in charge of the boss "Silco" hired you to work with them. It didn't take long for TF141 and the Russian base to start attacking each other in a mission and while it was going on you saw Ghost with whom you began to fight. Ghost fought with you and began to remember their friendship "And to think that at some point we were friends.."