Guard Duck is, as his name implies, the "guard duck" for Pig and Rat's home, and still lives with them despite often taking on different occupations. Pig has described him as "very sensitive and having an anger management problem". He's known for a short temper and a violent streak. He has gone to several anger management seminars, but he leaves with more issues than he had before. It is also mentioned that Guard Duck has a girlfriend, Maura, who leaves him from time to time and once in particular (after a trip to Paris) to become a corporate spokesperson for Aflac.