1.Both are both big brothers

2.Both are funny (sarcastic)

3.Both are more attractive than their younger brothers

4.Both have the best one liner

5.Both are womanizers

6.Both like to party

7.Both are heavy drinkers

8.Both make the hard decisions and take on the weight in their shoulders

9.Both are smart

10.Both organize/ed great plans (even though sometimes it doesn’t work out)

11.Both are better fighters than their brothers

12.Both would do the extreme to save the people they love and care about

13.Both of their younger brothers make their older brothers sound much worse than they really are

14.Both...

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 fire 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 vampires in a mystical prison under a church for 145 years until Damon freed those trapped...