Duke of Weselton

The Duke of Weselton is the central antagonist of Disney's 53rd full-length animated feature film Frozen and a cameo character in Disney’s 58th full-length animated feature film Frozen II. The Duke of Weselton is a dignitary from Arendelle's neighboring kingdom Weselton, commonly mispronounced as Weasel Town (although if one is fluent in German language and pronunciation, it would be pronounced as VAY-zel-tun).

His title proves he holds great power in his homeland, and on his formal wear, one will notice several badges and medals, indicating a history of significant accomplishment despite his rather meek character. He may also be the most powerful figure in Weselton aside from the ruler itself, though they're never mentioned or even alluded to. The Duke also has two burly bodyguards at his disposal, though they rarely speak and usually stand by the diminutive royal's side to protect from any and all harm. Even so, they do find their boss' character rather odd, considering their facial expressions during their introduction on Elsa's coronation day.

In relation to Arendelle, the Duke of Weselton controls the trading business between the two kingdoms, and notes that he's Arendelle's closest partner in trade. He's likely the closest visiting dignitary in the kingdom during Queen Elsa's coronation judging by his prominence throughout the events of the film. How long he's been associated with the kingdom and whether or not he knew the original king and queen before their deaths is unknown but highly likely.

In Shadow and the Snow Queen
The Duke is once again, an important antagonist here. He uses his personality and other tools to try and eliminate Elsa and Shadow the Hedgehog. He also deals with other characters, but that's an entire different story for now!