As to how it's done, it's terribly complicated I'm afraid. But essentially we are able to enter a person's "palace", the root of their distorted desires and use our power to free them from whatever evil has rooted in their heart.

[... she almost hesitates on the next part.]

We use our personas to help us. Which, our personas are like...a rebellious soul within ourselves. They grant us power if we have the resolve to use them.