The Scottish Destro, whose full name is James McCullen Destro, is "the faceless power behind the largest manufacturer of weapons technology," who'll do anything for the right price, according to his file card. Wherever a battle is brewing, you'll find Destro — and if there's no battle, he'll manufacture one, just to further his interests. "The silver battle mask he wears into battle is a family tradition, and one he displays with pride. Makes you wonder what those folks talked about at the holiday dinner table!" (This is all from Destro's "file card.") And the only thing stronger than Destro's love of cash is his hatred of the G.I. Joe squad, although he respects their fighting abilities.
But according to the script review we read a while back, Destro's mask in the film is made of nanotechnology, and allows Cobra Commander to control his mind. So judge for yourself whether this looks menacing, or nano, enough: