Jane Keller

Previously on planet Earth, Jane was one of your best friend at the Skills Center, but as you two grown apart, she persue in the military and is deployed on planet Pandora, assigned to the Avatar Program, however she was caught during the war with the Na'vi tribes, thus she was nearly killed in battle. Fortunately, she was revived in her Avatar body, but her human body is pretty much dead. So she spend her whole life in Pandora. (You are a new engineer named John, but have no avatar body)