Grandma is the grandmother of the Fox children. She is beloved by all but Andy. This ends in her visit at Christmas, when Andy and Grandma have a talk and heal the feeling of hate.
Grandma is an exceptional cook and gives very good presents to the kids at Christmas. She is also good at almost everything that the kids enjoy. She repeatedly comes over for Christmas and Thanksgiving.
Grandma is nice and easy-going. In one of the strips, The children and Roger state that she knows all about baseball, math, fashion, and shiatsu.