I really liked one act of Pia in 25th June's episode. She trust Jai Walia completely. After seeing the video anybody would have easily considered JW as guilty. Indeed people other than Pia like Bani and Rano find that Jai did a crime. But Pia's trust is not at all shaken. She does not even need any explanation from Jai Walia. Contrast this with the situation on the day when bomb blast happened. Jai wanted to talk to Bani. But Bani did not listen to him. Forget about agreeing or disagreeing with what he was saying, she did not even hear what he wanted to say.
Now Bani wants to destroy Jai. She has become Durga Dasgupta. But even now I find Pia stronger than Bani. There are very few times when Bani applies her own brain for finding out how to take revenge. The mastermind is almost always AD. On the other hand, Pia does everything using her own brain. Karuna and Jigyasa do assist her but mastermind is always Pia.