I notice that the official page's aura magic explanation is partly wrong.
Is says:Aura Increase Limit Break rate

In fact,I think it should be "Aura Limit Break rate 100% occur"

After you use aura on a character,sometimes the command do not have limit break choice.But you can keep pressing "D" key on the keyboard,until the choice occur!(No matter how many hp you got,even 9999,it doesnt matter)
So you don't need to keep "Attack" and wait for another chance.

Have a try now

Oh yeah....I have some questions (again) ,its about cards:

How do you get Zell,Kiros,Irvine and Selphie cards???