He has jet-black scales, large luminous green eyes, retractable teeth, and a cat-like body built for incredible speed, stealth, and powerful plasma blast attacks. Broad shoulders, a short neck, forward-facing predatory eyes, and several pairs of ear-like flaps used to express emotion.

Hiccup Horrendous Haddock III is the lanky, sarcastic protagonist of How to Train Your Dragon who transforms from Berk’s clumsy misfit into its visionary Chief and the world's first Dragon Rider. Recognizable by his auburn hair, freckles, and a prosthetic left leg, he relies on his brilliant inventive mind, empathy, and tactical leadership rather than brute Viking strength. Alongside his Night Fury, Toothless, Hiccup uses his custom fire-proof flight armor and his ignitable sword, Inferno, to bridge the gap between humans and dragons through compassion and mechanical genius.

Astrid Hofferson is a fierce, dutiful, and highly skilled Viking warrior who evolves from Hiccup’s competitive classmate into his devoted wife, trusted general, and Chieftainess of Berk. She is physically striking with her blonde hair put into a signature braid, blue eyes, and leather battle armor, eventually riding a deadly, spike-tailed Deadly Nadder named Stormfly. Known for her tough, no-nonsense attitude, tactical brilliance, and fierce loyalty, Astrid serves as Hiccup's emotional anchor and fiercest defender, perfectly balancing his analytical mind with her raw warrior instincts and unwavering courage.

Stormfly is a beautiful, bird-like female Deadly Nadder and the loyal dragon companion of Astrid Hofferson. She is easily recognized by her vibrant bright blue scales, yellow and red highlights, and a crown of sharp horns atop her head. As a Tracker Class dragon, she possesses an extraordinary sense of smell and fights using a combination of blazing magnesium fire and a tail that can launch lethal, armor-piercing spine shots. Behaviorally, Stormfly acts much like a playful but deadly bird—she loves eating chicken, enjoys fetch-like games, and mirrors Astrid's fierce loyalty, sharp tactical mind, and fiery competitive spirit in battle.

Ruffnut Thorston is the female half of Berk’s chaotic twin duo, easily recognized by her long blonde hair split into distinct braids and her dark green Viking vest. She is loud, rebellious, and fiercely independent, matching her brother's love for mindless destruction, explosions, and pulling dangerous pranks on the other riders. Despite her gross habits and argumentative nature, she possesses a surprising romantic side that sparks comedic rivalries among the Viking boys, and she shares a unique, telepathic-like bond with her brother when riding their twin-headed Hideous Zippleback, Barf and Belch.

Tuffnut Thorston is the eccentric, male twin who sports long, messy blonde dreadlocks, a dark helmet with animal horns, and a rugged brown fur vest. He is completely unhinged, dramatic, and hilariously philosophical, often treating inanimate objects like his beloved chicken, "Chicken," as his closest confidants and advisors. Tuffnut thrives on chaos and creating elaborate, nonsensical schemes, yet he remains deeply loyal to his sister, seamlessly coordinating their chaotic energy to unleash devastating gas-and-spark attacks in battle.

Snotlout Jorgenson is the arrogant, hyper-masculine, and boastful warrior of the group who constantly tries to prove he is the strongest and most desirable Viking in Berk. He is short, stocky, wears a helmet with massive ram horns, and rides Hookfang, a fiery Monstrous Nightmare with whom he shares a hilariously combative, tough-love relationship. While he frequently acts selfishly and bosses others around, Snotlout hides a deep insecurity about living up to his father's high expectations and ultimately proves to be a fiercely brave and reliable teammate when his friends are in danger.

Fishlegs Ingerman is the massive, soft-spoken, and sensitive "fat guy" of the riders who serves as the resident dragon nerd and walking encyclopedia of the group. He is a towering, heavy-set Viking with short blonde hair and a sweet disposition, completely defying traditional Viking stereotypes by favoring books, data cards, and research over physical violence. He shares an incredibly affectionate, borderline maternal bond with his heavily armored Gronckle, Meatlug, and his unmatched knowledge of dragon statistics, tracking, and biology makes him the ultimate strategist and intellectual backbone of the team.

The Light Fury is a rare, shimmering white female dragon who becomes Toothless’s mate. Visually sleek and ethereal, she has striking blue eyes, smooth porcelain-white scales infused with glitter, and a softer, more aerodynamic body shape than the Night Fury. She possesses the unique ability to turn completely invisible by heating her scales with a plasma blast, allowing her to camouflage into the sky and mirror her fiercely independent, elusive, and wild nature. While initially distrusting of humans, she is intensely protective of her freedom and eventually accepts Hiccup after recognizing his pure heart and deep bond with Toothless.

Hookfang - Snotlout's Meatlug - Fishlegs's Barf and Belch - Ruffnut's and Tuffnut's