For a brief moment, Noct's eyes widen. What the hell? Well, it does make sense that Ravus would go after Luna; they're the only family the other had left. Still, he has to fight to keep the image of Ravus lying lifelessly on the ground, surrounded by letters he'd written to Luna, his prosthetic arm lying on his chest with the Sword he held for him sticking from the ground.

Not to mention the daemonified form on the ground, still smoking...

"Oh," he grimaces. Ravus couldn't have taken the loss well. Really, though- what does he say to that?