Gladio was aware of Noct's problem with the head from this morning, which is why the back of his neck received the smack, not his head. And the bickering- well, it's mostly harmless taunting. But nothing they didn't say to each other before so it is nothing to worry about.

Noct is just a sore loser, that's all.

The familiar sight of the petrol pumps gets a smile from Noct and he slips out of the car the moment Ignis parks them. Stretching his legs and all.

"Yeah, curatives." Noct hums and then calls Ignis over, "Let's shop." He will leave Prompto to gawk at Cindy since this is one of the rare opportunities he has.