The Adventures of Tintin partially deaf physicist and a regular character alongside Tintin, Snowy, and Captain Haddock. He was introduced in "Red Rackham's Treasure", and based partially on Auguste Piccard, a Swiss physicist. The leading characters do not initially welcome his presence, but through his generous nature and his scientific ability, he develops a lasting bond with them. Eventually, by the end of "Land of Black Gold", he becomes a resident of Marlinspike Hall. Normally mild-mannered and dignified, Calculus occasionally loses his temper and acts in a spectacularly aggressive manner in response to actual or perceived insults, such as when Captain Haddock belittles his
Tintin (character) uncomplicated as the story line". Hergé never explained why he chose Tintin as the character's name. He had previously made use of alliteration with the name of his previous character, Totor. Michael Farr speculated that Hergé had adopted it from Rabier's "Tintin le lutin", although Hergé insisted that he did not learn of this book until 1970. Farr commented that "Tintin" was probably the character's surname, as other characters, such as his landlady, occasionally refer to him as Mr. Tintin (as printed on his doorbell). Conversely, Assouline asserted that it could not be his surname, because he lacked a family.