From what I’ve played Final Fantasy V-X-2.
I would have to say for the heroes, Gau Final Fantasy VI is the worst in both appearance and existence for many reasons. I didn’t like Zell in FFVIII, due to the way he acted through out the game, story line. Then theirs Quina, funny at times, then again irritating at times. All most forgot, Cat Sith... ? (Supposed to be tragic at the Ancient’s Temple). Final Fantasy X, has to be Wakka, the big freshy. X-2 maybe Rikku at times, not really. I all most forgot again. Final Fantasy V that would have to be Krile. (Appearance).