Serious to Inigo, but absolutely casual and normal to ask a pal to Tidus. He figures the way that Inigo stares at him is out of suspicion than what it actually is, which he doesn't actually think too much about himself. The question popped out thanks to a previous chat with someone else, and he wants to know!

"Exalt..." He's probably heard it before, but Tidus wants to say it with his own tongue, curious about the shape. He realises there's some different meaning behind it than just 'king' or 'queen'; the way he's hearing it than just one of the two words again, and figures to clarify- "So where you're from, it's just the royal Exalt? And that's the person in charge? You wouldn't be Prince Inigo?"

Like that?