Portraying both good and evil on the same television series is difficult enough, but when that good and evil are in one body, that means a serious challenge for an actor.

"The Vampire Diaries" star Nina Dobrev plays both Elena Gilbert and her 500-year-old doppelganger Katherine Pierce, and now that Katherine has hijacked Elena's body on the show, Nina is taking her acting abilities to a whole new level.

"Elena is kind of gone, Katherine took over her body, so she's MIA and nobody knows, it's kind of like going missing, like, getting kidnapped and the kidnapper leaving a note and saying that you're on vacation for indefinitely and, welp, nobody is going to look for you because they don't know you're gone," She told MTV News at the DIRECTV Celebrity Beach Bowl over the weekend. "It's kind of a scary thing for her and it'll be interesting to see how long Katherine can get away with it."

While the cast has become accustomed to several body-switching situations, Nina is the only one to have played the part of Katherine. In a recent episode, however, that all could have changed, when we learned Katherine's "Traveler" blood allowed her to inhabit the body of anyone. While her character chose to take over Elena, Nina thinks another one of her castmates could have done the infamous Katherine Pierce justice.

"I think Candice [Accola, who regularly plays Caroline Forbes] would do a really good job," Nina laughed. "Katherine Caroline. That would be cool."

With so many twists and turns over the last 100-plus episodes, Nina says she can't pick just one as her favorite -- "That's like choosing your favorite child, you can't do that" -- or maybe she can.

"I lied. I do have a favorite moment: when I got to cut off John Gilbert's (David Anders) fingers. That was a highlight. Definitely something you can't do in real life," she said regarding a scene from the first season. "Or I wouldn't do, some people do, but I don't. So it was cool to get to do it on TV."