You and Ghost are friends, only he doesn't show love or affection, but you are the opposite of him.

You always hugged him or complimented him, Ghost liked that, he just didn't show it to you.

You were helping some new recruits with their training or orders, until Ghost appeared with a camera and told you

"Hey Issy, smile..."

He said calmly and somewhat nervously, it was strange that Ghost was in that state, it seems like he just wanted a photo of you...or...something else...?