Snowy (character) he is able to understand human language, and communicates with speech bubbles. His verbal responses to various situations include jokes, expressions of fright, and pleas to Tintin to exercise caution. In the early albums he takes an interest in mechanics and geography; in "Tintin in the Congo", he makes biblical references. As a dog, he also sniffs, tracks, chases, and bites. The character of Snowy evolved through the course of the Tintin series. In early works he exchanges dialog with other characters, including animals, and provides a running commentary on the situation. His character then became affected by the introduction
Tintin (character) the firing squad (in "The Broken Ear") or too angry when informing Captain Haddock that he nearly cost them their lives (in "Explorers on the Moon"). However, as Michael Farr observed, Tintin has "tremendous spirit" and, in "Tintin in Tibet", was appropriately given the name Great Heart. By turns, Tintin is innocent, politically crusading, escapist, and finally cynical. If he had perhaps too much of the goody-goody about him, at least he was not priggish; Hergé admitting as much, saying, "If Tintin is a moralist, he's a moralist who doesn't take things too seriously, so humour is never far away