It's Iifa (iifa). I once had a huge debate with Nemesis the Warlock about this, and I had loads of screenshots to prove that the first letter is an "i". It makes no sense that Square would spell it with a lowercase L every time when it's clearly a name. Even the "Tree" part in the name Iifa Tree is spelled with a capital T. The text on the first FMV on Disc 1 has the text "Iifa", and it clearly looks like a capital "I" there. Although Nemesis managed to misread that as a "T" (Tifa?) even with my screenshot being there. :rolleyes2