Not much is known about Mattis, he doesn't enjoy talking about himself a whole lot. In fact, he doesn't like talking a whole lot in general. But one thing is for sure, people will agree, if you're ever stuck in the middle of nowhere with nothing but the clothes on your back, he's the guy you want with you in the moment. An avid survivalist in a previous lifetime perhaps, or a learned skill after the fact, nobody knows. The way he carries himself is not one of blatant confidence, but it isn't shrunken in either. More wound up, present and aware. His eyes might seem to be that of a brooding and haunted soul.