[ 9S assumes the frown is associated with the low-res comment and goes on blissfully unaware that he may have offended a human. Truly, a happy ending. ]

They're goggles, actually. They come equipped with thermal sensors, target functionality, a customizable HUD, all kinds of good stuff.

[ And he'll make no move to take the goggles off. It doesn't occur to him at all that it might be rude to keep his eyes covered. ]

My name's 9S, by the way. I'm an android. Mage faction, I assume. Nice to meet you, sir.

[ He taps the little moon with a chunk taken out of it embroidered over his heart on the strap of his backpack. ]