Mr. Benjamin "Benny" Krupp is the main antagonist and deuteragonist of the Captain Underpants franchise by Dav Pilkey, serving as the cold, cruel principal of Jerome Horwitz Elementary School who transforms into the clueless superhero Captain Underpants. Role in the Story • School Principal & Antagonist: He acts as the authority figure who hates joy, laughter, and children, constantly trying to catch and harshly discipline the prank-loving fourth-graders George Beard and Harold Hutchins. • The Inciting Incident: When he threatens to separate George and Harold into different classes to destroy their friendship, the boys hypnotize him into believing he is Captain Underpants. • The Superhero Alter Ego: A finger snap triggers his transformation into Captain Underpants (who is bumbling, fearless, and wears only white briefs and a red cape), while water dousing turns him back into Mr. Krupp. Personality Traits • As Mr. Krupp: Abrasive, cantankerous, petty, ironfisted, and deeply insecure. He is power-hungry yet surprisingly immature, often acting more childish than his students out of bitter frustration.
