|Affiliation:||J. W. Müller ; Counterfeit Ring|
|Behind the scenes|
|First Appearance:||The Black Island|
|Last Appearance:||The Black Island|
Ranko attacks Tintin when he arrived on the Black Island and his arm is eventually broken after a conflict between the two. He is terrified of Snowy, although possessing tremendous strength. It turns out that he is in reality harmless, follows Tintin to shore without harming him. Tintin helps his arm and placed Ranko in a Glasgow zoo after the arrest of his keepers.