Board Thread:Speculation House/@comment-24682147-20140807044834/@comment-3146930-20140807201222

He may have called her innocent based on her childlike optimism, wanting to make the world a better place and hoping everyone will have a fairy tale happy ending (maybe because she wants to prevent something like her mother's death?). However I can't see her as completely innocent because she is a skilled Grimm slayer that goes around chopping heads off.

As far as her having PTSD, if it happened at a young enough age, Ruby may not remember it fully and can't consciously pull up the memory. Maybe she only has flashes of memory in her dreams when the plot demands it. As far as we know, no one has brought up the topic of Ruby's mom and the song Gold makes it seem like Yang has been trying to drive Ruby's bad dreams away and has been doing a good ob so far.