Had a feeling about her since the first time she came on in the 7th episode of the first season. *(I just completed season 2 so i could be way off but if I had to I would put my money on her)

1. Claims to be Pshychic.
2. Hates that Patrick doesn't believe her.
3. Tells Patrick that her daughter was sleeping when she was killed.
4. Has rich clients in powerful positions. 
5. And most importantly both their skills are equally matched

red john character love comedy love to mock at other people
- she want to get close to him that make him idiot that what red john wants to feel that he is the only smart one
- she also act as if she speaks with spirits
- at end at the time of every crime ( also when jane saved ) here place was unknown

This (playing) deluded woman is my beat, I don't know what happened to her when she was abducted and there is a good reason to believe that she can do what P Jane(male) does with competitive skill and intellect as R John(female), she has resources with her scam arts too. I could be wrong though.

I think that Red John is Kristina Frye mainly because I get very weird vibes from her. When Red John "kidnapped" her and she was "dead" that made me think she defiantly had something to do with it. She "talked" to Patricks wife and told him that his daughter never woke up. I also think that she is a fraud and knew that his daughter didn't wake up because she was there.

My only argument is the phrase "Roll Tide" that Red John said to Jane at the final of season 2, how could he know it if she isn't Kristina Frye herself ?...they both only knew it.

it was Christina in the outfit. The voice was feminine and small in stature. She is missing but knows way too much about Red John. It would make for a great twist.