15-year-old son of chief Stoick, initially deemed too weak to fight. Trains under blacksmith Gobber and creates mechanical devices. Shoots down a Night Fury, befriends it named Toothless, and designs a prosthetic fin. Takes Astrid flying to prove dragons are friendly, loses his left foot saving Berk, and becomes a hero.
Peer and classmate who transitions from skeptic to supporter of Hiccup's dragon-bonding methods.
Fellow trainee who eventually becomes an ally in befriending the dragons.
Peer and classmate who shares the training environment and later joins the rebellion against the Red Death.
Fellow student in the village training program who initially views Hiccup as an outsider.
Mutual romantic attraction that develops from initial suspicion to deep affection and partnership.
Mentor-apprentice relationship where Gobber teaches Hiccup craftsmanship and mechanical design.
Biological father and village leader who initially struggles to accept his son's unconventional nature.
Explore the full interactive character relationship map of How to Train Your Dragon