do not know about that but hey that sounds like a plan turn evil lady to good lady then i can play the devil who will try to come in and take her back to his side and it will be a tug of war over lily poison.hehe
Maybe she offers herself to the Grove for a way out of her relationship with the Devil and she winds up becoming the earth user. Or it at least sends her down the road to becoming the earth user.
that is like a plan and they found out Lilly was corrupted when she was raped by the devil and when he loses her he shows up thinking maybe making him an npc were anyone can control him .