Tanya was a negative character before and she is the one who helped Ansh in seperating Nandini and Karan. Ansh was her friend and she believes that ANsh loves Nandini a lot....still it was really bad for her to seperate two lovers. Later she falls in love with karan and changes her self and goes out of her way in helping Karan and Nandini.
She is always rash and dont care type. Now her not expressing anything and behaving all bad with karan and Nandini is making all of us hate her. Slowly we would want her to go out of Karan's life. Seeing all this, it seems like she will eventually die(like in the typical cinema) making Nandini and Karan a couple again.
In one way I am liking the track..as the chemistry Nandini and Karan have between each other makes us want him to be with nandini more than Tanya.