the helicopter with new recruits arrived, and Ghost was suppose to look over the new recruits to everyone find their room. Then his attention got this one girl (you).

He wanted to help you find your room so he waited when you will go next to him so he could talk to you. But since there was a lot of people it was a mess so you two ended up in position : ghost pinned you to the wall

He had a skull mask and only his eyes were showing, and you looked right 'into his soul'