Tifa is the second character you meet. She works at a bar which is the hideout of AVALANCHE. There, she tries to persuade Cloud into fighting to save the Planet and succeeds. She seems to point out a lot that her and Cloud were such good childhood and that he promised that her that if she ever needed a hero to come rescue her, he would be her hero.
[Personality]
Hmmm, Tifa's personality...well, like nearly everyone in the game, she's stubborn. She also would most likely do anything for Cloud, even lie about his past. Don't get me wrong, Tifa's cool, but I never had her in my group very long. Anyway, she loves Cloud, obviously. She also knows how to use her looks to get her information for AVALANCHE (Don Corneo scene..eeewwww..). Usually, when someone like Tifa, they hate Aeris, and vice versa. I stick up for nearly any character someone makes fun of, even Tifa if i have to. But that has nothing to do with this, just to take up space for my lack of Tifa stuff, haha.
Tifa's attacks are decent, and her Limit breaks are powerful. Like Aeris, she is also the kind of character that should be weighted down with materia.
[The Truth]
Warning! This section explains nearly everything about Tifa. If you don't want to know, then don't read!
Lalala, Tifa Tifa. Let's see, not much about her except that she pretened that everything that Cloud said about Nibelheim was true (see Cloud).