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 and Astrid share a deep romantic bond that culminates in marriage and shared leadership.
Grimmel serves as the primary antagonist, directly threatening Hiccup and his dragons.
Valka provides critical intelligence that shapes Hiccup's defensive strategies.
Hiccup holds command authority over Ruffnut and the broader Berkian group.
Stoick is Hiccup's deceased father, whose past words inspire Hiccup's journey.