This Seeking Tech guide will show you how to unlock the Jeanne d’Arc trophy called I Like How It Burns. To get this, you need to attack with a triple stacked Burning Aura.
I was able to get this by accident on the 11th stage.
One of the hidden mechanics of the game is that a character will be able to carry the Burning Aura when they are moving around as long as it landed directly on them. So, you may want to use that to your advantage for battles as well as setting yourself up by stacking your auras.
I was also able to get this trophy without attacking the enemy. Instead, it popped for me while I was using the healing spell.
You should also be able to get this trophy easily if you have the Two Rounds or Three Rounds skills.