VII, VIII and X: what are their classes?

[Lacarus]

Red XIII = Red Mage?

This maybe caused by the fact that the Enemy Skill materia is found just when you find Red, or that he's a beast, but Blue Mage?

Vincent = Gunner/Berserker
Barret = Gunner
Irvine = Gunner

Works for me.

Cait Sith = Gambler/Beastmaster
Selphie = Gambler

I can see where you're coming from, but wouldn't that make Wakka a gambler too?