She looks like Ms. Frizzle from the Magic School Bus, but she's dead.
Frizzle is an incarnation of a Deva. In this lifetime, she is a librarian first, and storm wizard second. She was leading an expidition of young children into the Extreme Library on a field trip when “shit got real.”
She died, but in a rare moment of lucidity between lives, came back as the same personality. She had kids to save! But first, the world.