Berserker Bewilderbeast

The Berserker Bewilderbeast is a Bewilderbeast that appears in "King of Dragons, Part 2". It was hunted down on Berserker Island by Johann and Krogan in Dragons: Race to the Edge, Season 6, due to its species being the fabled "King of Dragons".

Found by Johann
During the war between the Dragon Hunters and the Dragon Riders, Johann acquired enough Dragon Eye lenses to determine the location of the "King of Dragons". The Dragon Riders also were able to use Dragon Eye lenses to determine the King of Dragons' whereabouts - Berserker Island. The two factions clash at the island. Johann, Krogan, and Hiccup discover that not only is the "King of Dragons" a huge dragon living underneath the island, but that she has an unhatched egg. Only Johann and Krogan actually see the Berserker Bewilderbeast. Though Hiccup is saved twice by the Berserker Bewilderbeast firing ice at his opponents, he never actually lays eyes on her.

Physical Appearance
The physical appearances of the Berserker Bewilderbeast are very similar to that of Valka's Bewilderbeast. She is predominantly white with gray markings. However she is smaller than Valka's Bewilderbeast.

Personality
Not much is known about the personality of the Berserker Bewilderbeast apart from that she uses her telepathic powers to send a distress call to all of the dragons. Despite rearing an egg and offering some protection of it, she does not seem very bothered that humans handle the egg and eventually take it away.

Johann
The relationship with Johann and the Bewilderbeast is a strenuous one due to the fact that he keeps trying to ever steal her egg or enslave her. Eventually the Bewilderbeast kills Johann by freezing him to death.

Krogan
Krogan's relationship with the Berserker Bewilderbeast is very similar to that of Johann's except unlike Johann he survives his encounter with the Bewilderbeast but is later taken before his boss, Drago, who isn't happy about his failure to capture a Bewilderbeast and has him killed.

Hiccup
Hiccup never actually sees the Berserker Bewilderbeast. However his life is saved by her just before Johann tries to run him through with a spear. It is unclear if she understood that Hiccup was trying to help her and the egg, or he merely was not in the direct line of fire.

Trivia

 * Since the Berserker Bewilderbeast is guarding an egg, it is possible that this individual is a female and the mother of the egg.
 * Ruffnut and Tuffnut believed that it was actually their great uncle Fenris Thorston.