It's her, Chrystina Petrova (the vampire diaries)

When the intire Mikealson family is brought back to live and has sattled down in Mystic Falls, Elijah goes to Charlottesville. He sees a girl who looks queit similar to Elena. When he does some research on her, he finds out that her name is Chrystina Petrova and that she's Elena's biological sister. He becomes friends with her and her bestfriend Sam Kinney, who's a hybrid.

When Klaus finds out his brother is friends with one of his hybrids and a girl who looks a bit like Elena , he asks Elijah to get some information.
what wil happen when he finds out. Will he stay the new Klaus, the Klaus Caroline is starting to love. and why is Kol always acting so weird around Chrystina.

I do not own any of the characters or the story of the vampire diaries (where this story is based on) I only wrote this fanfic