Board Thread:Speculation House/@comment-67.10.153.186-20140912011222

Hopefully this hasn't been discussed yet, but it case it hasn't, here goes my Cinder Theory:

Okay, by this point, we know that Cinder is an allusion to Cinderella. Thanks to Episode 7, that fact has really sunk in, and it got me thinking:

In the story, Cinderella had evil step-sisters. There are quite a number of similarities between Cinder and Yang. What if Cinder is Yang's step-sister (by blood, making Ruby her step-sister by relation i.e. my sister's sister is my sister).

Evil Cinderella and the Good Step-Sisters. 