hmmm this is getting interesting, but i think i know what's happening here.. i definitely see Nisha as Rashi for many reasons..
krish said that rhea's chat name is rashi, with makes me think that rhea might be the one protecting rashi.. she might have deliberately put her chat name as rashi so as to confuse people, especially whoever is after the real rashi. in that way they will never succeed in reaching her!
also, rhea and nisha are always seen together. in the jungel, rhea was portrayed as the scared one, who thinks there's something wrong, but she can nevertheless not do anything about it. nisha, on the other hand, is more of a carefree girl, but she knows how to handle tough situations.. (she was trained, maybe? being the pm's grand-daughter, she has to be equipped)
i am heading more towards nisha being rashi, as rashi is very witty. before when she went to meet the pm, she hasn't written her real name down on paper. instead, she wrote zodiac. it shows she is careful. and if she is that careful, there's no chance she will deliberately put her chat name as Rashi and let the terrorists get to her.
rhea, i feel, tries to protect nisha, as she knows her real identity. but somehow she can't. she doesn't have the brains for it..
that's just my opinion.. please do comment..😳