There was nearly a joke about 'V is for Villain' here, but Vanessa and Victoria only make for two so they're not quite half of the villainous characters.
Vanessa is super strong and durable, but her main mutant power is an emotional thing. The primary and most powerful feature of it is that she actually gets stronger in the presence of people who are scared, particularly of her. It almost dooms her to a villainous role, but this was kind of an origin story play, she was almost a normal athletic girl until that power kicked in.

I'm not sure if I should do Vanessa vs Denise as a story, or introduce the character who's going to be the hero of the cast first.