Tidus wants nothing to do with any of this. Inigo, even Roland - just let him be in his own world where no one can fuss him about ohhhhh, Tiduuuuuss, why're you so weird about hugging? Tiduuuus, why are you so bad at huuuugs? Why aren't you like meeee, why don't you want to hug all the tiiiiime.

Specifically, Inigo. Because Inigo is the sole issue of this problem and won't ever! give him! a break about it! And, at the very least, the water is safe. Water is his friend, and being under it iis a haven from those who barely know how to swiWHAT IS INIGO TRYING TO DO TO HIM UP THERE

So apparently, no: No escape is allowed. And how doesn't a guy not lose a few air bubbles when he's getting flopped on from above? Especially when Tidus doesn't expect the danger, the fool that he is! It doesn't get Tidus shooting up for air, but he does slap Inigo's sides with his hands, trying to know what this guy thinks he's doing!! Which is apparently, be a leech, and Tidus doesn't know if the other guy can breathe or not where he is.

And is it the water getting warmer, or the energy expended in attempting to deal with Inigo, and having the other guy crowd him?

It may be surprising, but Tidus doesn't stay below for long. He's coming up to take this lump of a guy with him out of the spring before he does something stupid like faint, and so he can say, once gasping, breathing for air--