I like both Nehmat and Naaz. So until there is no solid reason l will not term either of these girls a villain. There is also another reason for me to not do so and that is if I see Naaz as a villain what about Advait? He is completely negative.
I have just stated my opinion about Naaz and as you have said it is up to the makers to decide what they want to show.
@puple question Yes as of now Advait is also completely negative and a villain.
And I'm really disliking the way Advait is using Mallika for his own selfish motives.
Like Advait is not thinking about Mallika's feelings when he is getting close to her and uses her for separating Nehkam.
And I hate Advait for doing that and see him also as a villain.
It's upto the CVs on whether they will turn Advait positive or not later.
But for the question you asked, my answer is as of now I consider both Advait and Naaz as the main villains.