Vicki Donovan (Kayla Ewell) is first introduced on the "The Vampire Diaries" as a troubled teen, struggling with drug addictions and a broken home. She has romantic relationships with the mayor of Mystic Falls' son, Tyler Lockwood (Michael Trevino), and Jeremy Gilbert (Steven R. McQueen). She is the sister of Matt Donovan (Zach Roerig), former love interest of Elena Gilbert (Nina Dobrev). In the later episodes of season 1, Vicki gets transformed into a vampire by Damon Salvatore (Ian Somerhalder), when he feeds her his blood and snaps her neck.
In her human life, Vicki constantly sought drugs to fuel her highs to help her forget about the troubles of her life. As a vampire, Vicki also could not control her thirst and had trouble containing her desires for human blood. Stefan Salvatore (Paul Wesley), a more humane vampire, tried to teach Vicki to satisfy her hunger without harming humans. Despite his efforts, Vicki soon spiraled out of control and attacked Jeremy, forcing Stefan to stake and ultimately kill Vicki to protect those around her.
Vicki Donovan is the first character the audience sees transformed from human to vampire. Her role teaches the lesson about the dangers of leading a self-destructive life.
"Why do I have to pee? I thought I was dead?"
"Now I'm bored! And all I can think about is blood, I just want some blood. I can't think about anything else. What is that about?"
"I have a few new toys, and I won't hesitate to rip your little head off."