Mrs. Mancy

Mrs. Mancy is the principal of Westmore Middle School. She has a minor but recurring role in the books.

Role in The Last Straw
In the Valentine's Day Dance, she told every student that the dance would count 20% of their Phys Ed grades and went with Mr. Underwood noting down the marks.

Role in Cabin Fever
She is briefly mentioned when Mrs. Lahey threatened Leon Goodson and the other kids to spill their Rowdy Riots or she will report them to her.

Role in The Third Wheel
She is mentioned by Greg when she announced that there is a limit of toilet papers the kids can bring and only 5 are allowed.

Appearances

 * Diary of a Wimpy Kid: The Last Straw (Only physical appearance)
 * Diary of a Wimpy Kid: Cabin Fever (Mentioned)
 * Diary of a Wimpy Kid: The Third Wheel (Mentioned)

Trivia

 * It's implied that she and Mrs. Heffley are friends, because in the first book of the series, Greg talks about how he tried but ultimately failed to get put in the "easy" reading group at his school. While nothing was confirmed, Greg figures that Susan (who he claims is "really tight" with the principal) did some string pulling to have him put in the advanced group.