No one had expected this, her. They never knew she existed until now. No one had told the Salvatore's that Elena had a twin sister. No one, until she showed up that is. What exactly is Ariana Gilbert? A witch? A vampire? A werewolf? And what's this about a prophecy about Klaus? They didn't see it coming, but she did. - Pairing: Klaus/Stefan/OC(Ariana)