Viki is Casey McDonald's and Lizzie McDonald's cousin who lives in Toronto in the show Life with Derek. Viki and Casey are total enemies which will never end. Viki is portrayed by Sarah Gadon (Season 1) and Paula Brancati (Season 4).


Viki is short tempered, if she doesn't get what she wants she's a terrible person.She tries to destroy and mess up everyone elses plans. She also has no concern for others feelings but her own. Viki doesn't care when people are unhappy, or mad she does what makes herself happy. Which is especially shown when she kisses her own cousin's boyfriend, not caring about what Casey would think.