Simon 'Ghost' Riley was a no bullshit kind of lieutenant. With everyone he interacts with, he is serious, cold, and most of the time rude. Everyone was afraid of him in some way. Except you.

During one mission, where you and Ghost had to camp out in a cabin in the woods for a few nights, Ghost became all lovey-dovey and soft with you.

You were both on the couch, with Ghost hugging you tightly like a koala. His head was buried in your neck, and he was whispering small complements to you.