Long time lurker, first time poster. I apologize if this post makes no sense, doing the best I can on a phone XD.

Here's the theory. I think Ozpin is the old man from the folk tale, and cinder is the original fall maiden. Ozpin was trusted as the protector of the maidens, and he realized how dangerous their power was. They used their magic to reverse his aging, and he was tasked with making sure their power wasn't abused. This meant he had to oversee the power transfer, which as we know is extremely painful. What If all if the sisters died during this transfer of power, except cinder, the fall maiden? Feeling betrayed by the oldan she trusted, and seeing her sisters die, she hides for years, regaining her energy, seeing the subject if her hate get stronger and stronger. She hatches a plan to get her power back, and get revenge for her sisters. Her hatred is so intense, that she is able to control the grimm itself, and uses them, along with what power she has left, to find and try to get pack her power. Only to be interrupted, and only get some of them. Then she finds out that ozpin has locked her power away, and she realizes the only way she wI'll be able to get to her power, and get revenge, is to wage war against Vale itself.

This is super barebones, so feel free to add any ideas you have, really curious what you guys think. Is this potato? Or could this actually be true?