Otto wouldn't have been offended. He knows how he looks. He did consider whether or not to mention it before coming, but...he just couldn't make himself do it. Who wants to give out disclaimers about their terrible inhuman appearance every time they meet someone new?

So he appreciates the poker face, even if he suspects it is one. And he's not really offended to have it brought up either; frankly it'd be probably be strange if we all just pretended they weren't there.

"Oh, yes? Is she a scientist?" He isn't doing much to restrain the actuators right now, so one is watching her while the others seem to be idly keeping an eye on the room. Otto himself ignores them entirely, taking a sip of his drink. He hasn't removed his sunglasses even after settling down indoors. It's dimmer in here, yes, but not that dim.