I think she is either the Doctor's daughter (season 4, episode 6) or his future wife (that ones a bit of a big theory). However, knowing Stephen Moffat, she'll probablt end up being the person you least expect.

I hope she is some evil villain thats out to make the doctor belive she knows him, and him her (in the future)to gain his trust, but she is really plotting to end him. Of course she will be thwarted. And i am most likely grasping at straws he he

Ive heard shes The Rani. But I suppose that falls under he category of 'some villain'.

Well some people think that she's really Lucy Saxan i'm happen to be with them why? read this and no I didn't make it link


if not then wife.

Theres also speculation that shes The Doctors Daughter. Id be disappointed if she was, I had so like Jenny.

Lucy Saxon?? I'm not Lucy Saxon! :D

link

i think she is the doctors future wife. i just wish i knew . it is so exciting to know who she is

I think Future Wife.

the doctor's wife