"Lost pages are women that have freed themselves from the Erossu Chains. They could escape the grasp of the Erossu Masters and begin the new life with Erossu abilities."
For example, Erossu Love Nectar. It had side effect of hypnotizing, but as they freed themselves, they have grasped the ability for their personal use... And as world is big, so the realms are... There are a lot of treasures that can work perfectly with this ability, allowing them to reach the greater heights!
And one also must know that depending on the lady's experience, she might have more or less erossu abilities, so the threat is real.
"Oh, so they have freed themselves? That's good. I hope they can start normal life."
"You! You don't get it?! Once they see-"
"Shut up. Of course I know that they want to kill me. What I want to tell you is that once they come to me, I won't kill them simply because they have directed their killing intent at me. Simple as that."
"..."