Katarin (Michelle Rodriguez) is a villainess from the movie Bloodrayne.
She is a mercenary, a member of the Brimstone Society, a vampire hunting group, looking after Bloodrayne to help them destroy a powerful vampire named Kagan. Katarin is ruthless, and kills whoever stands in her path easily. Katarin argues with Bloodrayne, claiming that she cannot be trusted. But the real traitor is Katarin herself, who soon joins Kagan's forces, helping him to find a hidden magical talisman.
She goes to an underwater cave, where the talisman is, but Rayne catches her, and break her neck, then drinks her blood.