Katherine- the survivor

Katherine Pierce, born Katerina Petrova (Bulgarian: Катерина Петрова) was a witch of the Traveler sub-culture and a former main character of The Vampire Diaries. She was also the second-known Petrova Doppelgänger of Amara and a former vampire. Katherine can be considered the main antagonist of the series overall due to being a major antagonist in the first, second, fourth, fifth, and eighth seasons and all the antagonists that were a result of her actions.