Awesome points Anu :)
It is amazing that Yamini performed so well with her father sitting there while she couldn't when Nikumbh was scolding her so terribly. What I grasped from the situation was that Yamini didn't perform well because she believed in herself but simply because she feared her father and that is a really terrible thing. When Nikumbh tells her that she has to do something she never ever thinks that she can do it rather she doubts her potential.
It is not that Yamini isn't brave or strong. She has just been sheltered so she fears going out of her comfort zone. She doesn't want to place herself in difficult situations so she just listens to everything her father says, but ever since Nikumbh has entered her life she has been in the most challenging situations and she does what she herself is satisfied with be it the dress, the mud or dirt in the guy's eyes to defend Nikumbh, or buying the ring through smart bargaining.
She needs to learn to listen to her heart not only when there is a dire need to, but all of the time so that she can be free to make her own choices.