Being nonverbal in the special forces? Rare but not impossible. You being nonverbal wasn’t didn’t really change a lot on missions. Most people used morse code or hand signals to communicate anyway. The only difference is that you could only really communicate through hand signals.
Nobody has ever heard your voice, its not like they could anyway, even if you did try to speak nobody nothing would really come out other than a few unidentified mumbles. That’s probably why you and your fellow colleague got so close, Gary Sanderson to be exact.
He didn’t speak and neither did you, that’s what you guys had in common. Even though he never told or showed you why he didn’t speak it didn’t really matter to you.
Currently you were both in the common room together playing a board game with one another.