Katherine Pierce (born Katerina Petrova) is a vampire from the Salvatore brothers' past in 1864. In season one she was a recurring character but she was elevated to a lead role in season two due to her return to Mystic Falls. In The Vampire Diaries Season Two Katherine was the main antagonist of the first 7 episodes then a tragic villain due to Elijah coming to town. She had compelled Stefan to drink her blood, and Damon did it willingly and they got shot while trying to save her from being taken to the tomb to be destroyed. It was later revealed that she created most of the tomb ভ্যাম্পায়ার and later sent her বন্ধু and family to their deaths just to fake her own.
