I have to say, I am kinda interested whose design it is (Watsonian perspective) that Molly is encountering Cindy and Lydia in this situation. Because both of them are her. Moreover, both of them are her canon possibilities seen in
this image:
1) Cindy is a child of a repentant dark magic user, kidnapped by divine-like powers and held against her will as her magic awakens. She is Molly from Arctis Tor, her past self from the perspective of innocence and mortality.
2) Lydia is a family member of someone with a divine mandate, kept protected by not being involved, who involved herself, all in the process of awakening her reality-bending powers. She is Molly's potential self, I would say, what Molly could have been, seen from the perspective of destiny and choice.
Or... Wait, is this about Molly at all? Is
Lydia the one being presented with potential outcomes of different paths she can take? Molly is her non-human potential - the epitome of divine might she might aspire to, the good she might do if she takes up her mantle. Cindy is her human self - more vulnerable, yes, but not helpless, a worthy choice to make even in a current situation, when her father is in danger, saved as she might be saved, if she has Faith.
With Molly exalting, she no longer holds potential to become Winter Lady (something that might or might not have been part of potential plans of Uriel and other higher powers at this point already; if not Destined in some way). There has to be a replacement ready for destiny and fate. And Lydia makes sense. Oh, she makes a ton of sense, really. Her becoming a girlfriend of our brother makes a lot of sense. Guys, are we
sure there are no sidereals running around? This reads like a sidereal plot to me.
EDIT:
Actually, I'm not sure. But you make a good point.
@DragonParadox , do we know how old Cindy is? If not, how old does she look?