What would a RWBY fanfic about Ruby brainwashed by Cinder be like?

A RWBY fanfic with Ruby brainwashed by Cinder could be a dark and complex tale. The fanfic could start with the event of the brainwashing, perhaps Cinder using some sort of dark magic or psychological manipulation. Once brainwashed, Ruby's appearance might even change slightly to reflect her new state, like a darker look in her eyes or a more menacing stance. Her relationship with her team would be shattered. Yang, for example, would be extremely distraught and determined to get her sister back. The story could also involve other characters like Ozpin or Qrow trying to find a way to reverse the brainwashing. There would be a constant battle between Cinder's control over Ruby and Ruby's true self trying to break free, all while the fate of Remnant hangs in the balance as Cinder uses Ruby as a tool for her own malevolent purposes.