Mariana was first shown at the funeral proceedings for Karen White; hissing at Stefan to display her villainous persona. Later in the film, Mariana appeared and flirted with a punk gang at a nearby bar, and took them to a deserted warehouse. Mariana turned heel and sent her werewolf henchmen after the group, while she snarled and watched. During the attacks, the evil Mariana appeared in partial werewolf form, and gave a sinister snarl to cement herself as a villainess. Mariana was later killed by Ben with a silver knife in the film's climax.