Gramma, as she is addressed, is Greg's maternal grandmother. Greg and his mother believe that she plays favorites for Manny, but she always denies the charge, saying, "I love my grandchildren all the same.[8] In Dog Days it is thought that she a died dog named Henry. Later in the book, the Heffleys give their dog Sweetie to her. She is known to drive a Ford like the Heffley's car.