Outcast Tribe

The Outcasts are a tribe of Vikings that have been bannished from various tribes, particularly the Hairy Hooligan Tribe. They are led by Alvin the Treacherous. While originally enemies of Berk, the two tribes eventually made peace and became allies. They first appeared in the series, Riders of Berk, serving as the main antagonists of Season 1 and the secondary antagonists of season 2.