Berserker Herald

The Berserker Herald appears and is listed in the credits in the Dragons: Riders of Berk episode "Twinsanity", then again in the Dragons: Defenders of Berk episode "The Night and the Fury".

Announcing Dagur as the Chief of the Berserkers
The Chief of the Berserker Tribe makes an annual visit to the Isle of Berk. However, in "Twinsanity", the new chief arrives - Dagur the Deranged. The Berserker Herald announces him to Chief Stoick when their ship docks at Berk.

"Presenting the high Chief of the Berserker tribe, cracker of skulls, slayer of beasts, the great and fearsome... Dagur the Deranged!"

- Berserker Herald

Waiting for Dagur at Dragon Island
The Berserker Herald accompanies Dagur to Dragon Island to hunt dragons in "The Night and the Fury", along with other crew members. He and the other Berserkers stay on the ship while Dagur goes to the island alone. Dagur meets up with the Dragon Riders and eventually discovers that the Hooligans are indeed friendly with dragons, having lied to him in the past. Dagur rushes to his ship and alerts his men to the situation.

"So, Berk does train dragons? I should kill that runt for lying."

- Berserker Herald

Trivia

 * It is possible that Vorg is the Berserker Herald as they have the same appearance. However, as the Berserker soldiers all look similarly and the Herald and Vorg are specifically referred to in the episode credits, this connection cannot be determined. Both Berserker Herald and Vorg are voiced by Brook Chalmers.
 * Though not confirmed, the Berserker Herald may have also appeared in "Dragon Eye of the Beholder, Part 1" and "Dragon Eye of the Beholder, Part 2".
 * It is also possible that he is the Berserker Guard seen in the Dragons: Race to the Edge, Season 5 episodes "Something Rotten on Berserker Island" and "Sins of the Past". However, this connection is also indeterminate, especially due to this Berserker being voiced by James Arnold Taylor instead of Brook Chalmers and has a different speech pattern and demeanor.