Chief Berserk is a minor antagonist from the How to Train Your Dragon book series, who first appeared in the book, How to Break a Dragon's Heart.
The Chief Berserk is the one who kidnapped Camicazi and imprisoned her. Once Hiccup and Fishlegs went to Berserk, they saw the chief sitting on a shied being carried by two of his people and he electrocutes himself showing how strong he is. fishlegs stated that he is a Berserk, but the Chief disagrees. He decided to sacrifice the two boys to the Beast, so he imprisoned them in a hanging cage that can be lowered to the Beast. When the Beast was freed by Hiccup, the Chief freed the prisoners and go away from the island.
He appeared as a big man with chains around his body, while he sits on a shield. He even electrocutes himself to reveal how powerful he is to his people. There are even chains around his body, since those are metal, which makes electricity flow.
Chief Berserk is likely arrogant, since he is shown to electrocute himself in order to show others how strong he is. He is also likely sadistic to people, since he attempted to kill them by feeding them to the Beast.