Margaret Millicent Maudita Smythe or Moody Margaret is a character in the Horrid Henry books and TV Series. She is best known as Horrid Henry's classmate. Margaret forms the Secret Club in her back garden, in which consists of her friends, such as Sour Susan, and occasionally Gorgeous Gurinder and Lazy Linda, this club often rivals with Henry's Purple Hand Gang, with her and Henry living next door to each other. Margaret lives with her parents and no siblings have been mentioned, so it's likely she is an only child.