Board Thread:Speculation House/@comment-4830106-20131108040231/@comment-5172618-20131123164711

Angren Túrë wrote: Teravor wrote: My bet is that Cinder is somehow related to Yang. Would put ground into the theory that Yang is the adopted one. Although I feel like Crimson's fire is somehow more sinister. I'm getting a real strong Melisandre vibe from her, if anyone watches Game of Thrones.

Yang and Ruby are blood related. And it is not uncommon for the characters to have similar semblances for example Glenda and Weiss both use glyphs just of a different nature so it shouldn’t be a surprise that Yang and Cinder have a similar look when using their semblance.