Karan's character has changed so much over the time. First, they showed him love Mandira so much, and hate Virani's. Then, he loved Virani parivar so much, and hated Mandira. Once Tulsi appeared dead this time around, he had changed and treated Mihir badly, preferred his business and Tanya. He was a 'bad' person, even when Gautami/Tulsi came back, and was bad not only to Tulsi and Mihir, but also, to Baa. Then, again he seemed to turn 180 degrees, and became pro-Tulsi, Mihir and parivar, and became against Tanya.
Should we wonder if this time he is good, and is going to stay that way? Could he be pretending to be good, but only thinking of himself and business under the pretence?
I know he has been a really good son to Tulsi, but then he transformed into different person, asking for Tulsi's money to be divided, didn't care when Mihir walked out of the house, and then Baa, too. etc. He is the last one any of us will suspect to be bad with a evil ulterior motive. This time, the way they have him react to Jas etc, and only him, other than Mihir, is a little too suspicious....I just hope my gut feeling is wrong, and Karan is not going to tuen into a negative role...