Quina = Frodo = Kefka = Ultimecia, if you consider your previous post. XD

Plus, Quina attacks with forks. To eat properly, and conquer the world, s/he needs a knife. Who uses knifes? Zidane. So, Quina = Kefka = Zidane = Frodo = Ultimecia.

But if Zidane is Ultimecia, Dagger is probably his Knight. So, Dagger = Squall, and Quina = Kefka = Zidane = Frodo = Rinoa = Ultimecia (back to the original theory).

Etc. I bet someone will include Aeris soon. XD