Dagur the Deranged is a former antagonist and major character in DreamWorks Dragons, first appearing as the main antagonist in Riders of Berk, later became an anti-hero in Race to the Edge. He is the newly-appointed chief of the Berserker Tribe who swears revenge on Hiccup Haddock after believing the Hairy Hooligan Tribe broke a peace treaty with his people by training Dragons in secret, joining forces with Alvin the Treacherous in order to attack Berk before betraying him and taking command of the Outcast Tribe for himself. 3 years after his initial defeat, he escapes his imprisonment on Outcast Island and aligns himself with the Dragon Hunters, before ultimately redeeming himself and becoming an ally to Hiccup and Berk.