Things like how you say Tifa and the FFX characters names is a matter of pronunciation, which is a different issue to "what is the girl who wears the pink dress in FFVII called".

By the way Tei-fa is just how you say Tifa in Japanese, as in Tiffany. It is no indication as to the true pronunciation. If that was the case, Tidus would be called Tei-da (no S at all there), well, to be honest that was probably a localisation change, but anyway... Lets not confuse the issue even further by bringing in pronunciation.

[cough]Aerith[/cough]