Board Thread:General Discussion/@comment-26955331-20150903191738/@comment-5414218-20150905025437

It's impossible to cover all the dumb Raven theories available on the depths of the interernet. This post already covers the most common ones and states all the reasons correctly. Good job man.

Personally I find the "Raven is another daughter of Yang's mother with some other man." the most interesting option, but it's most likely her mother.