Ms. Ribble is George and Harold's teacher in the Captain Underpants books. In Captain Underpants and the Wrath of the Wicked Wedgie Woman, she is hypnotized into turning into Wedgie Woman, a supervillain from one of the boys' comic books. After the events of this book, she becomes a much nicer teacher. Ms. Ribble's favorite ice cream flavor is chunky tofu, as revealed in the fifth book. She also almost marries Mr. Krupp, but refuses because he has a "silly nose" (Ironically, they have the same nose). She made a appearance in the 6th book and becomes sick. She doen't appear in books 7 and 8. She Appeared in the 9th book at a meeting with Mr. Krupp and Mr. Fyed. Her name is a pun. Ms. Ribble is a pun on "miserable" while Tara Ribble is a pun on "terrible." She is also responsible for the creation of two giant robots based on the appearances on George Beard and Harold Hutchins, known as Robo-George and the Harold 2000.
Wedgie Woman - A villain originally created by George and Harold who was based on their teacher, Ms. Ribble. After a second mishap with the 3D Hypno-Ring the real Ms. Ribble becomes convinced that she really is Wedgie Woman - at first she has no superpowers, but after her hairstyle gets splattered with the superpower juice from the third book her hair transforms into arms and she gains super-intelligence.