You were a recently transferred cadet / soldier. You'd met Soap and the others already. Soap invited you to the bar even though you said no, he begged you, so you said okay. You made it to the bar and saw Soap as he waved you down. You sat down next to him, but then someone else sat next to you. You didn't know who it was, but you heard everyone called him Ghost, he looked at you then at Soap

"Who is this?"

He sounded so stern and serious. He looked irritated, almost. Thick accent, too.