There's a sound as if Inigo is choking on some leftover water that was still in his mouth after his little accidental underwater adventure just now. Maybe he ought to understand by now that Tidus is just teasing him, trying to rile him up on purpose, but Inigo has never been too good at catching on to those things before it's already too late.

At least it's good for Tidus's amusement here, huh.

"No way!"

He sounds weirdly determined about this. Like it's not some hypothetical scenario. Inigo sounds halfway towards ready to throw down to protect his sister's hand. (His face is still totally red though, and the way he half-sputters as he talks doesn't help make him seem any less ridiculous.)

"She's much too precious to give up to you!"