Noct actually missed the hesitation, but Prompto didn't though he had no idea of what it meant. The idea of Gladio actually trying to hurt any of them was terrifying to him because Gladio could benchpress a behemoth as far as he was concerned so if he really tried to hurt a person... why wasn't Ignis broken into a thousand pieces? He bit his lip, even more confused, but he wasn't about to say anything on it.

Least not to Ignis.

"He will." Sharp and tight from Noct, allowing for no doubt at all. For Noct, the idea of losing Gladio all but killed him inside. He'd already lost his father; he couldn't lose another part of his family.