Dorothy Ann Hudson is a fictional character from The Magic School Bus, who has been featured in both the book and TV series respectively. She is a student at Walkerville Elementary School and the class bookworm of Ms. Frizzle's class. Dorothy Ann is shown to always carry a pink satchel, holding books that she keeps on hand and when reading about different facts during a field trip, she usually begins with saying, "According to my research." She has been called "D.A." by her classmates on occasion. Dorothy Ann loves astronomy and physics. She wears a violet turtleneck sweater, a turquoise pleated skirt, purple ankle-length socks, and maroon and white sneakers, and wears her hair in pigtails tied in red hair ties.