And personally out of all three sisters you mentioned, preeta has the weakest characterisation. She's always been shown far more meek and fragile in tough situations compared to pragya or bulbul and I'm not even a fan of pragya and never really liked her all that much yet I see preeta being far much more weaker than pragya where pragya for me has still always had a stronger voice. Preeta's strong voice has only ever been with karan.
That is EXACTLY why I believe she will now be the one taking revenge ON Karan. I agree among the four sisters Preeta does seem to be the meekest in terms of a lot of things. Nevertheless, I believe she is characterised that way, in order to show her as being an extraordinarily empathetic person. I am going to go as far and say that may be Preeta has been shown to be even more empathetic and emotionally driven as person than even Pragya. However, being docile, meek or being more empathetic doesn't necessarily make her the weakest among her sisters.
I feel as thou there is this hidden fire inside her, and Karan's betrayal should ignite that fire. (I know I am being overtly hopeful, and very optimistic)
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