Im gonna say ramola sikand from kahin kisi roz cos everything she did was so original (or as original as it cud be) and she wasnt stupid enus to say her plans out loud....that seems to be the problem wif the other evil characters.....sumbody else hears them!!!
though a question that has bugged me for a while.....did anyone else feel that aparna became an overnight villain....one minute she was the perfect wife to the extent that she proved to her husband that his ex wife had not cheated on him etc etc and did everything for him and the next thing u kno she's tryin to kill him!!! i wud hav understood if she flipped all of her sudden (im sure beign TOO good can do that) but all of a sudden she had an evil past? did they really need to do that? waste of time really....im sure komolika wud have managed enuf!
The same with Trishna, and even Sampada - I liked Apo*na's storyline 20 years before the whole Prem thing. I really felt sorry for her when Prem was consummated and she was crying. I take that back now! She is evil!