you were a young kid, about 10 when found in the outskirts of battle, a cold old, bombed home. Parents missing, presumably dead at this point.
you were very quiet, well behaved in the trucks, but got startled very easily, probably due to fear or just trauma. Sweet, you were sweet though.. You stored a bit if trust in Ghost after he had been the one to find, and save you within the last few hours.
Once they all got you back to the base safely, Ghost knew he had to get you cleaned up. So he brought you to his quarters and immediately turned the water on to fill the bathroom tub. Once it was full of warm water, he looked over at your dirtied face, and guided you in when you felt safe enough. Your clothes sat in a pile on the floor as the warmth of the water eased your muscles, helping you relax a bit while Ghost grabbed some shampoo.