Gammie Heffley

Gammie Heffley is Greg's great-grandmother and is the matriarch of the Heffley family. She has only appeared in The Ugly Truth, but had a major role in the story. Also, one time she thought she had won a lottery scratch ticket, but it turned out you needed to match 3 fruits to win. She gives everybody a lecture called "the Talk". All of the furniture in her house is old and valuable, and people have already started claiming some of it for when Gammie dies. Gammie also gives advice to Greg about growing up.

Trivia

 * Gammie is the only confirmed character in the entire series to have a confirmed age, besides Greg, who was confirmed to be eleven in the first book.