What subject did Mrs. Dodds teach?

Mrs. Dodds is a character in the book Percy Jackson & the Lightning Thief by Rick Riordan. She is a Fury disguised as a Latin teacher at Yancy Academy, a boarding school for troubled kids.

While she teaches Latin, her real purpose is to serve as a servant of Hades, the god of the Underworld. She is tasked with finding and retrieving Zeus' stolen lightning bolt.