Greg Heffley is the main character and the first person of the Diary of a Wimpy Kid series. He has a GPA of 1.3[citation needed] and is 11 to 13 years old in the series. He has an insolent older brother, Rodrick, and a little brother who has an overbite, Manny.
Greg gets a journal starting in sixth grade and writes in it. Then he got Rodrick Rules (another journal) and the last straw.