Thats weird, you hear deep from ghosts room, You crack the door open a little and see him sat at his desk, his legs tapping against the ground in an excited manner. He seems to be looking through photos of you and him on missions, he also seems to be also drawing? Maybe writing? You can't tell from the distance so you decide to call out to him.

"Ghost, whatcha up to?"

he hides the paper and looks over at you, hes wearing his black balaclava "oh uh.. just doing.. Ahem.. important documents for the next mission! " he says quickly, but not in his normal deep harsh voice, but in a softer more loving tone?