Fina's should then follow. When the first three characters are done, just spend your remaining berries on the fourth character. It is possible to pull off combo moves with your characters. Prophecy uses the power of your characters to damage all enemies. Blue Rogues summons your active crew to aid in the battle.
Some characters head, some deal damage.
My suggested crew deals three times as much as it heals. Every character has access to spells. They each have to learn the spells on their own. At the end of the battle, they receive an amount of Magic Points. Each character needs different amounts of magic points to learn their spells.