Vicki is Matt Donovan's older sister. It is revealed that she is a drug addict. She has had sex with many people including Tyler Lockwood and Jeremy Gilbert. Damon, out of bordem, changes her into a vampire, but later has to kill her with her being out of control. It is presumed that she left town, until Caroline Forbes finds her body. The athourities say she was overdosed on drugs even though they know it was a vampire that killed her. Jeremy still doesn't get why she was buried, so he starts asking questions.
Vicki isn't in season 2 because she is dead. Although in the Finale. Jeremy sees Anna and Vicki. These two might be the consequences that the witches were talking about. They waill definetely have a role in season 3.Edit