Vaan: Archer/Green Mage (bows, green magic, time magic)
Penelo: Black Mage (staves, black magic)
Ashe: Paladin (Mace, shields, white magic)
Basch: Warrior (axes, swords, heavy armor)
Balthier: Gunner (guns, "special skills")
Fran: Lancer (some arcane magic, spears, heavier armor)