A 30-year-old father and the responsible Chief of New Berk. Standing 6' 1" with auburn hair, bright green eyes, adult facial hair, and mature chieftain clothing. He still utilizes a metal prosthetic for his left lower leg. He grapples with his legacy and worries about how future generations will preserve the history of peace with dragons now that they are gone. Empathetic, kind, and fully devoted to family unity and his people. He has grown past the need for personal glory as a "dragon master." Thoughtful and mature, though he still retains his trademark cleverness and subtle sarcasm.

A 30-year-old mother and the Chieftess of New Berk, co-ruling alongside her husband, Hiccup. Features her characteristic blonde hair and striking blue eyes, dressed in traditional, mature Viking chieftain garb. Mother to their two children, Zephyr and Nuffink, and acts as Hiccup's most steadfast supporter and emotional equal. Her fiery teenage competitiveness has evolved into calm, steady wisdom and natural firmness. Warm and nurturing to her family, while deeply committed to preserving Viking traditions and the legacy of their peace with dragons.

A male Night Fury and alpha dragon of the Hidden World. A protective, caring mate to the Light Fury and father to three Night Light offspring (Dart, Pouncer, and Ruffrunner). Retains his signature intelligent expressions, curiosity, and dog- or cat-like goofiness. Features a stealthy jet-black scaly hide, expressive large green eyes that change pupil size with emotion, and retractable teeth. Continues to wear the mechanical left tail fin engineered by Hiccup.

Female Light Fury. Features shimmering, pearl-white scales, striking blue eyes, and heart-shaped tail flukes built for high-speed flight. Shares a tender bond with Toothless and acts as a deeply caring mother, managing her curious offspring. Highly comfortable in her domestic environment but remains cautious around humans and strangers.

Classified as a Night Light, she inherits her father's black body color and speed-oriented structure, but features her mother's striking blue eyes. Features a small white patch on her nose, white-tipped ear nubs, and white patches with a faint pinkish tint on her lower and middle areas. Naturally brave, friendly, and intensely curious, she finds the Hidden World dull and actively craves adventure. Driven by stories of her father's past, she acts as the ringleader for the group's journey to New Berk to encounter humans and the surface world.

A Night Light. Features mostly black scales like his father, a completely white underside, white-tipped head nubs, and distinctive pale green eyes. Sports a compact, agile hatchling body that serves as a small-scale replica of both a Night Fury and Light Fury. Known as the least adventurous and most docile sibling, with a frequent habit of falling asleep in random places (even mid-flight). Rarely starts trouble, choosing to quietly tag along with his sister Dart's escapades or engage in play-fighting with his brother Pouncer.

A Night Light. Features a primarily white body like his mother, accented by contrasting black patches on his ears, spine, and tail, along with distinctive bright teal-green eyes. Possesses a balanced hybrid build that blends the sleeker frame of the Light Fury with the broader structural features of the Night Fury. Described as lively, pleasant, and slightly quieter than his hyperactive siblings, with a love for games like hide-and-seek. Highly energetic, he frequently pounces and play-fights with Ruffrunner and is always quick to follow Dart into mischief.

Features shaggy, light blonde hair with small braids in the back, bright green eyes, and a thin, lanky build that mirrors a young Hiccup. Wears a baggy red tunic with gold trim, a brown belt with a Night Fury head buckle, dark trousers, a single-tooth necklace, and reddish-brown boots. Known as a turbulent, fearless, and high-energy explorer who loves action, rough play, and easily shrugs off bumps or knocks. Highly enthusiastic about family traditions and, while he usually follows his older sister Zephyr's lead, he possesses an independent, uncontained excitement for discovery.

Features auburn hair in braided pigtails, bright blue eyes, and a style mimicking her mother Astrid, including a studded red headband and a studded leather skirt. Inherited Hiccup’s engineering mind, which she uses to build elaborate home-defense booby traps. She constantly observes her surroundings and sketches in a personal journal. Exhibits a stubborn streak and a sharp, cynical wit reminiscent of a young Hiccup. Initially views dragons as dangerous monsters based on Stoick the Vast's old journals, but she entirely overcomes her fear after a direct, gentle meeting with Toothless.