The King of Mo is the ruler of the Land of Mo where he lives with his Queen and several children, including Prince Zingle, Princess Truella, Prince Jollikin, Prince Thinkabit, Princess Pattycake, and Prince Fiddlecumdoo. His royal chamberlain is Nuphsed, and the Wise Donkey was one of his advisors. His forty-seventh cousin and the queen's great-grandniece, Duchess Bredenbutta, also lives in Mo. The King of Mo carries his temper in his vest pocket, but occasionally it falls out and is lost. When the King loses his temper, he is generally in a bad mood until it can be found again.