"It made me sound like a nag." Grump grump, grump grump. Does Tidus want to be a nag? Absolutely not. There's a fixed idea Tidus has in his head about what a fixer is, and it's nothing he wants to be. Hopefully Inigo is being a GOOD PAL and being the one to open the doors for them, 'cause Tidus can't! But once they're trough to the other side, he's sitting this tray down on the first surface to come into view.

"Nags are what aunties are: telling you what you should be doing and getting annoyed 'cause you don't do things their way! That doesn't sound like me, does it?"

It's a contradictory tone - of, you can't think that, right? that's more sure, but the sliver of, please don't tell me I'm actually like that, man.