I think this actress has the ability to convey a wide array of emotions. As a role of a bitter, angry teenager...she was so convincing that most of us here grew to dislike her. Then she showed her childlike innocence by humbling herself to her mother when she realised her mistakes. The way she cried for Simran to help her over the phone really tugged at my heartstrings. I think it was a very realistic portrayal of a child gone astray with bad influence. Her face is very emotive. She shows sarcasm, hurt, anger and happiness very well. I think Yuvika has a bright future in acting and I would miss her in Astiva. Simran has more chemistry with Yuvika that with Sia.
By contrast, the actress who portrays Sia has only portrayed a dull, boring character. I am not condemning her as a person, only her acting capabilities. So far, her role is one dimensional...that of the perfect daughter. I think it is human to err, but the directors are not giving her a chance to deviate from this perfect persona role. So far, it is not realistic to believe that a long lost daughter would enter her new family with absolutely no feelings of jealousy/ resentment over her sibling. Even in healthy families, sibling rivaly is present.