This Seeking Tech guide will show you how to unlock the Jeanne d’Arc trophy called Don’t Fight if You Can’t Take the Heat.
On the third stage, you will be introduced to the Burning Aura feature. For this trophy to pop, one of your party members must be attacked while they are standing on an aura during the enemy’s turn.
This trophy requires a bit of luck, since you won’t be able to control who your enemy will target. You will most likely get this randomly while fighting the numerous battles in the game.
To increase your odds, try to surround a high-level enemy with your party. I was able to get this to pop on the fourth stage when I surrounded the English Officer.