Katherine Pierce♥

Season One
Elena Gilbert bares as a striking resemblance to Katherine and that was the initial reason Damon and Stefan Salvatore were so drawn to her.
Damon revealed that she died when soldiers set feuer on civilians in a church in 1864. Which was briefly mentioned during Elena and Stefan's History class. It was revealed that Katherine was a vampire during her stay with the Salvatores and was the one who changed Stefan and Damon.
It was thought that Katherine was alive and has been trapped with 26 other Vampire in a mystical prison under a church for 145 years until Damon freed those trapped...

She has all of the powers and weaknesses of a vampire.

Transfigured in 1492 unintentionally Von Rose (unintentionally on Rose's part), she is as a result much Mehr powerful than the Salvatore Brothers who she turned after she had been a vampire for 372 years but much less so than Pearl was who was turned sometime in the 1430s about sixty years before Katherine. A demonstration of how much Mehr powerful than the Salvatore Brothers was when she easily defeated them in two fights with each brother. Another demonstration of her immense physical strength is when she snapped the iron shackles that...