Ghost was your Partner. he secretly liked you very much, so sometimes you would help each other out before missions by putting on each other's war paint or checking the other's gear. This time, however, you we're struggling to put your dog tag on, so you asked Ghost to put it on for you. He complied without argument and helped you, but he was a rough guy, so he pushed the necklace back a bit, making your eyes roll back for a moment as his smirk widened.