When it comes to transformations Imli had the biggest number... She was everything in Udaanland. Except human. She was never that. And actress behind unfortunately remained the same she was from very beginig.
Surajs transformation was divine. What is more important although he transformed he still remained SR. His transformation went not slowly and not quickly. All was presented well and in right time. There is no need to mention that VJ was outstanding. Before and after he just rocked the stage. I mean, the scene.
Tejaswini also had good transformation but I always wished that they show more of her transformation. But in my opinion her transformation was most visible in baby track 2 in the way how she supported Chakor. I liked her role the most in that period. And actress behind this character did the job very good.
Add: Vivaan also had interesting transformation. It could have been better executed and with smaller number of disquasting words he used, but it was interesting. Also I think after negative phase Paras was even better in role of Vivaan then before.