She annoys Mr. Grumpy, Mr. Stubborn and Mr. Rude with her talking. She is a surly, grumpy and jaded caricature of the American public school system. He is portrayed as a serious, hardworking, but thoroughly grumpy and disgruntled employee. Revy is very confident, grumpy, aggressive, cynical, and emotionally unstable. He gets in trouble by Mr. Uppity and Mr. Grumpy. Mr. Grumble is the second grumpiest man in the world after Mr. Grumpy. He was generally good company and unperturbed by silences, though sometimes taciturn, grumpy, or detached. Mr. Grumpy is the grumpiest person in the world. This works, because it makes Mr. Grumpy nicer. Stanley goes back to his old grumpy self when they leave Florida. Thaw was the definitive Morse, grumpy, crossword-fixated, drunk, slightly anti-feminist, and pedantic about grammar. The character epitomised the archetypal grumpy old man. Like Mr. Grumpy and Mr. Bump, his favourite food is liverwurst sandwiches. Director Pete Docter explained that there is "something sweet about these grumpy old guys". The film also stars Keyboard Cat, Nyan Cat and Grumpy Cat.