I think that mystery women is Narayani Devi because she has helped Parvati the most but it could be any of them, you never know but I would like to see all the old character's return if this serial is going to come to a end but I think it won't if the TRP's are good, all they need are good storylines and not repeating same stuff over and over again.
Yh I can't belive I missed her out but I think she won't change herself because all the time she has been against Paro and her family but you never know it could be her.
I think it cud b mets because Parvati helped her alot and she is like Parvati when it comes to justice and family does anyone remeber when she took in all the old people Maa Ji, Daadi and Wendy Massi when Paro was in the house as Janki and Trishna chucked them out.