Board Thread:Episode Discussion/@comment-24993958-20170128134330/@comment-10390252-20170203092706

Interesting speculation seen about Cinder (in a DA fan comic of all place): She doesn't have a problem with Salem and her 'worshippers'. However, Pyhrra, Amber and all the Fall Maidens all the way back to the first do have a problem with them. Cinder is having problems seperating their feelings from hers in her head and it's breaking her concentration and weakening her normally-iron resolve.

This is why Salem has been trying to teach Cinder how to make a Grimm fear her. She's thinking that a similar mental discipline will let her control the 'echos' of previous/possible Fall Maidens and get full control of her powers.