It's Iifa Tree, with a caps "i". I had a thread about that once, with a lot of screenshots where you could see both "I" and "l" in the same sentence, and the first letter of Iifa was definitely "I", not "l". I pronounce it "ee-fah" myself. With Finnish pronouncing, I'd pronounce Lifa as "lee-fah" (the same with Tifa/tee-fah), but "life-ah" is plain hard to pronouce.