elfon
I could definitely see that breaking Cersei since she's very much a person character that lives by her fears desires and wants as long as he keeps on a tightly leash. He pretty much just made her a pleasure pet. I would suspect if he actually stayed long enough maybe a week of training her she probably willingly go with him to the north and accept someone replacing her given the fact that she is not exactly happy with her life and her only source of pleasure is leaving. Not that I can see this MC wanting that though you never know