Protagonist and Berk's chieftain who seeks the Hidden World to protect dragons from hunters. He builds a tailfin for Toothless, discovers the sanctuary with Astrid, realizes humans are unsafe there, battles Grimmel, and ultimately parts with Toothless. He later marries Astrid, leads New Berk, and vows to guard the dragons' secret.
Hiccup's effort to protect dragons directly opposes Grimmel's hunting campaign.
Grimmel attacks Berk, captures dragons, traps the riders, and battles Hiccup during the rescue mission.
Stoick remains an important paternal influence on Hiccup's search for the dragons' sanctuary.
Stoick is identified as Hiccup's late father, and Hiccup recalls that Stoick spoke of the Hidden World.
Their romantic partnership develops alongside their shared leadership and responsibility for the dragons.
Astrid supports Hiccup throughout the conflict, later marries him, and becomes his co-chief of New Berk.
Ruffnut is part of Hiccup's dragon-riding team.
Ruffnut is one of the dragon riders involved in the campaign against Grimmel and later returns to New Berk after her capture.
Valka provides Hiccup with crucial battlefield intelligence.
Valka notices Grimmel's approaching army during a scouting patrol and reports the threat back to Hiccup.
Related entry on Wikidata (Q17546728), public domain (CC0).