(The reason why I'm making several of those requests is that I lost a flash drive where some of my manga was stored and ofc I forgot to include the contents in the MU lists).
This manga was shoujo, I think. Fantasy. There is this girl who suddenly has awesome powers, she's like a god-avatar or something. She is taken in by a group of people who want to use her power to change the world. Then another sorcerer kidnaps her, he also wants to use her power but he falls in love with her. Not Saver.