As far as actress , she is a good actress. In Business proposal she did quite an amazing job.
So-i: She is a swindler who is taking advantage of gullible people. And she is becoming ruthless as she is raiding a tiger. As she dont want to get caught and she is willing to kill (indirectly) so many people. However she is missing a basic point that she will be destroyed no matter what, may be she is extending her lifespan. (having spent time with antagonists group, she could have guessed it and at least try to find a way out).
Though Pitiful (As Seo-Yul mentioned) yet Unforgivable . (Her role)
