I'd prefer not to portray him as more of a country bumpkin than he's already proven to be. Between his naivete, his lack of general knowledge, and his wholly unrefined fighting style, Oswald is quite possibly the most ignorant student at Beacon. He's not necessarily dumb, he's just forsaken years of education. But I'm sure that when he gets to have a bit of more IC interaction with the guys (especially Gren with that dirty mind of his) we'll see more of his...odd side. 

But as for the accent, I think I'll keep it on the backburner. Maybe have him slip into weird colloquialisms now and then, but probably won't make it into anything huge.

[@Agent B52], does Marcus's Semblance allow him to protect the [i]Unsubtle[/i] with his Aura?