Rules are simple:
1) You can pick any character from any RPG as long as they fulfill the team requirement.
2) No doubles, so you can't pick the same character more than once, even if they exist through multiple titles, you have to choose a specific one.
3) You must pick a character that fits the class requirement.
Pick a team:
Warrior
Wizard
Cleric
Thief
Paladin (Tank)
Non-Human
Red Mage
Wild Card