Ranko is the secondary antagonist of the Adventures of Tintin story "The Black Island", appearing near the end of the book. He inhabits the villains' hideout on the Black Island. His master is Puschov, and he attempts to attack Tintin and Snowy, causing each other to think he'll eat the other. His nightly screams inspired legends of the island being occupied by a murderous creature. It turns out at the end that falling downstairs, Ranko had broken his arm, so Tintin saved him, and they became friends.