Mr. Porter is Alex's grandfather, but it is unknown which parent's father he is. He stops Alex from doing dangerous things like running on ice, running out onto the street, or breaking a bone. According to Alex in "Pups Pit Crew", Mr. Porter always fixes things with a lot of duct tape.
Mr. Porter is the kind of the uncle or grandpa/granddad one would desire. He's nice, loving, wise, and caring towards others, especially Alex. He passes down ideas for Alex, but it usually doesn't turn out right for him.
Mr. Porter has pale skin and dark brown eyes. He has no hair, but he does have a set of eyebrows, a mustache, and a "soul patch". He wears a light blue shirt and a green apron. He is as tall as other adults like Mayor Goodway.