Dorothy Ann Rourke (a.k.a. D.A.) is a main character in The Magic School Bus Rides Again and a student at Walkerville Elementary.
D.A. is an intelligent and very beautiful young girl with shoulder-length blonde hair in a tomboyish ponytail held up by a violet holder and blue eyes. Her main attire is a pale purple shirt, a violet blazer, light blue trousers and orange ballet flats.
- In the original show, Dorothy Ann pronounced research "Riss-erch", but in this sequel, she pronounces it "Ree-search".
- Throughout the entire franchise, Dorothy Ann is referred to as such or more commonly, her initials "D.A.", but for reasons unknown, she's never referred to as just "Dorothy".