Mr. Fuller

Mr. Fuller is the husband of Mrs. Fuller. They live in Greg Heffley's neighborhood. They let him babysit their dog, Princess, after they went on vacation, but they came home early and saw that Greg neglected to clean up after Princess. As a result, Greg was not paid and he was never accepted for that role again in the future. he is also online. He is a grumpy man.

GTA Online
In the online book he has the same role, the changes are that his and his wife's username is "Rose" instead of Fuller and their dog's name is "Stevie Nicks", a possible reference to the Act Ten villain of Jojo's Bizarre Adventure.