1) Katherine brought Damon the cure.
2) Katherine has a plan B and a plan C and a plan D and well,you know how the alphabet goes don't you?
3) Katherine is the "safest psychotic cadela, puta in town."
4) Katherine looks out for herself, she will always look out for herself.
5) Deep down, Katherine really cares about both Salvatores. (- KW)
6) Katherine doesn't need a guy to save her. End of story.
7) Katherine believes in "Better you die than I."
8) Katherine drunk vervain for 145 years thus it doesn't hurt her.
9) Katherine isn't afraid to let loose and party when the occasion comes around.
10) Katherine...

“ I want what I want Stefan, and I don’t care what I have to do to get it. My list of victims is a long one, and I have no problem adding one mais name to that list. ”
— Katherine Pierce

Katherine Pierce (born Katerina Petrova) is a vampire and former lover of Damon and Stefan Salvatore. She is first shown in flashbacks, showing her physically romantic relationship with the Salvatore brothers, eventually turning them, but was captured por the townspeople of Mystic Falls to be destroyed.

However, behind her sweet nature, Katherine revealed her deceptive side and escaped her would-be death...