nayantara is also naagin n she is also daughter of maanyata . Actually both brinda nayantara are sis . Then swara in greedy of naagmani .she swapped brinda. So nayantara will be positive role n she is main lead. Don't worry. N brinda will married Rajat soon. Poornima ke Raat BAAD nayantara banegi nagrani.I don't agree with Nayantara becoming a Naagin or Manyata transfering her powers to her.She's already a Blue shaped Naagin as seen in the promos and last subsequent episodes.I don't mind Nayantara becoming the Naagin.Let the show have 3 Naagins but what I don't understand was the curve being thrown yesterday.Akshalesha Nakshatra or not Nayantara should have become the Naagin since we saw her change in the last episode during her fight with Brinda who saved Dev.
So Nayantara suddenly cannot be the Seductress Vish/Shesha in Human form with no Naagin powers.It would not make any sense at all even if Brinda has been revealed as the Yellow Naagin with black shades.And let's say Nayantara suddenly becomes the Human how would she fight Brinda then without her powers? Agreed they are siblings but don't share any blood relation between them.
Shivanya/Shivangi and Bela had capable advesaries in the form of Shesha and Sumitra.Yamini though being a Human was an exception.Every story specially like Naagin needs both powerful.Protagonist and Antagonist.
The moot question that should be asked now is whether Brinda would be a powerful.Naagin like her predecessors like Shivanya/Shivangi before her or go the Bela way.Also their clans have not been revealed as yet though I believe that Manyata and her 2 daughters Brinda and Nayantara are part of the same SheshNaag clan.