"A cousin! Family!" Family, even! Not that seeing a familiar face wasn't already a surprise, that's closer than Tidus was expecting. He's astonished - but hey, this happens even on the train for them, doesn't it?

"So, they know you? Oh, wait, they've snapped out of the fake life?"

Tidus is assuming they have, but you know. Might be worth seeing how much they've talked about after confirming they're both actually themselves again.