Miss Trunchbull is a fictional character from the children's novel Matilda by Roald Dahl. She serves as the headmistress of Crunchem Hall Primary School and is known for her strict and tyrannical behavior. Miss Trunchbull is physically imposing, often described as large and intimidating, which she uses to instill fear in her students. Her character embodies the theme of authority gone wrong, as she often punishes children harshly for minor infractions. Despite her harshness, Miss Trunchbull's character also highlights the resilience of children, particularly Matilda, who ultimately stands up against her oppressive rule.