Appearing in X-Men: The Last Stand, the blink-and-you-miss-her Callisto is feisty and sexy enough to dare go head-to-head with Halle Berry’s Storm. The fact that Storm beats her up and then electrocutes her to death is a mere technicality. Anyway, this leather-clad and tattooed mutant makes a fine addition to Magneto’s Brotherhood of Mutants. Until she dies, that is. At least Dania Ramirez lives on to tingle the man-cannon, though.