Gladio isn't even going to bother with being subtle about it. He can see the pinch in Noct's brow and can already guess that Noct's suspicious so he shrugs. "Not going into details, before you even ask, but... the doc's my new Guide."

Prompto, who had started to drink from a can of soda with one hand still on the controller, nearly chokes at that, the controller dropping into his lap as he coughs on inhaled liquid. "G-Guide?!" he coughs again, the game completely forgotten about as he stares over the back of the couch towards John.

Noct actually has the presence of mind to hit the pause button, though there is a brief look towards his own Guide to make sure Prompto doesn't actually choke to death. "...Guide, huh?" Gladio knows the prince wants more, but John's getting a once over before there's a faint look of, what, disgust? uncertainty? something similar on Noct's face and it's gone again. "You sure know how to pick 'em, Gladdy."

Gladio's eyes narrow faintly at that and he throws a look towards Ignis you're supposed to be teaching this kid manners before he gives a bit of a growl. "Show some respect, kid."