Ghost is aware that you’ve missed a meeting about an upcoming mission, because you had to do something important.

He’s standing outside general Shepard’s office, scrolling on his phone when suddenly you walk into the office. He can’t help his curiosity and tries to listen in to the conversation. At first he doesn’t hear anything, then, suddenly there's yelling, followed by a loud slap. Soon after that, you walk out of the room rubbing your now red cheek and clearly trying not to cry.