User blog comment:FairyRaven/Fairy Tail Chapter 437: Magnolia, Review and Commentary/@comment-7418318-20150525093151/@comment-7418318-20150528183151

Now that I think about it again, even in the anime she never learned that she was a snake.

She had those weird visions and meets Cobra, but I don't remember her ever learning the truth about her past. At one point she's even asked if she can remember anything of her past and she said she didn't.