Arturo Benedetto Giovanni Guiseppe Pietro Archangelo Alfredo Cartoffoli da Milano, in The Calculus Affair
Man in airplane in The Red Sea Sharks He angrily demands a parachute and Tintin knocks him out with one punch.
Kavitch, Secretary to Sponsz, in The Calculus Affair
Tintin, in Tintin in America
Professor Decimus Phostle, in The Shooting Star
Phostles assistant, in The Shooting Star
Snowy
Hergé’s self portrait in King Ottokar’s Sceptre
Cuthbert Calculus
Al Capone, in Tintin in America
Snowy
The Maharaja of Gaipajama and the Crown Prince of Gaipajama, in Cigars of the Pharaoh
Dr. Patella, Osteologist, in Destination Moon
Captain Haddock
Tintin in disguise, in The Crab with the Golden Claws
Thompson
Thomson
Proprietor of the curio shop, in Red Rackhams Treasure
Bill, the Ships Cook on the Sirius, in Red Rackhams Treasure
Phillipilus the Prophet, in The Shooting Star
Psychiatrist, in Cigars of the Pharaoh
Captain Haddock
Mastermind of Kidnap, Inc., in Tintin in America
General Haranochi, in The Blue Lotus
Tintin after diving, in Red Rackhams Treasure
Sheik Bab El Ehr, in Land of Black Gold
Yussuf Ben Mulfrid, military advisor to Mohammed Ben Kalish Ezab, in Land of Black Gold
Captain Chester, in The Shooting Star
Ivan Ivanovich Sakharine, Collector, 21 Eucalyptus Road, in The Secret of the Unicorn
Coco, Tintins African guide in Tintin in the Congo. He’s introduced on page 11 and mysteriously disappears from the story after page 26. Thanks to Paul McClelland for this answer.
Aristides Silk, the kleptomaniac in The Secret of the Unicorn
Prince of the Sun, AKA The Inca, in Prisoners of the Sun