A moment of silence passes before Shiro speaks up. "That would shift the sound of the engine. There's likely a difference in fuel consumption." He doesn't say anything about the last thing Noctis said. That is his private business. But he moves slower, letting the moment last so Noctis can savor it.

"I'm sure they'll understand why you went off without telling them. This place is safe and the reason was important. You didn't go all that far." If it had been Allura he'd have given her a look but let it go. No one was put in danger.

"I'm not too worried about the Black Lion. It's been powered down like this before. It will power back up given some time."