Of all the villains to feature in The Vampire Diaries
, Katherine Pierce
is probably the most popular and the most notorious. She has managed to hurt almost every single main character on the show during the course of eight seasons, which is a testament to her villainy.
Katherine began life on the show as series protagonist Elena Gilbert's ancestor and doppelgänger. She set out to destroy Elena's life, and everyone in it, and she was incredibly cunning and manipulative. However, even someone as scheming as Katherine can make mistakes.
So here are Katherine's 10 Biggest Mistakes (That We Can All Learn From).