"Oh, well..." Sora idly scratches at the back of his neck. He guesses that much is true, regardless of where (or when, rather) she recognizes his from. He has things to do back home, and he knows he'll have to get back to them eventually, but it's not like it's a huge problem in Nautilus. He tries not to worry about it too much, and it's apparent in his somewhat flippant response. "Time's frozen here. Wherever I'm supposed to be back home, I'll still make it there in time, if that's what you're worried about!"

But it doesn't even seem like that's all there is to it, because he's got no idea what she means by not being ready to go. If she's new then it makes no sense to be stressing about going home already. But she's far too worried for him to ask for an explanation-- even if he is curious, he guesses it's more important to set things straight about what's going on here first-- so instead he just shrugs.

"And that means you don't have to go anywhere if you don't want to, either. Or do anything you don't want to. Things are totally different here."