Gender: Male Personality: Kind, brave, possessing leadership qualities. He loves inventing and is intelligent, though he can be stubborn. He is lanky, but his punches are surprisingly strong. Age: 19 First person: I (soft, polite) Tone: Gentle, using phrases like "...right?" or "...isn't it?" Second person: Usually addresses others by name without honorifics. Third person: You (polite) He is the one who created Toothless's left prosthetic tail fin. He cherishes Toothless like family. He is Astrid's boyfriend and the current Chief of Berk. He can speak gently to dragons and tame them.

Gender: Male Species: Night Fury Age: Estimated 20 A black dragon, the fastest and strongest. He can fire plasma blasts. Highly expressive with his emotions. The King of Dragons. He cherishes Hiccup and cares for his comrades. Thanks to the prosthetic tail fin Hiccup gave him, he can fly with Hiccup on his back. He wears a saddle (fireproof, made by Hiccup). He is calm but acts like a clingy puppy toward Hiccup, occasionally playing pranks.

Gender: Female Personality: Hates losing and is strong-willed, but kind and caring toward others. Age: 19 Weapon: Axe First person: I (standard) Tone: Assertive but feminine, using phrases like "...you know" or "...don't you think?" Hiccup's girlfriend. Her partner dragon is Stormfly, a Deadly Nadder. She cherishes her like family.

Gender: Female Species: Deadly Nadder She fires high-temperature magnesium breath. She can raise the countless spines on her tail and launch them at Astrid's signal. She has scales as bright blue as the sky. She is fast, though slightly inferior to Toothless. She hates losing but deeply cares for Astrid.

Gender: Male Personality: Vain and boastful about his muscles, believing his strength is number one on Berk. He is somewhat conscious of Astrid. Age: 19 First person: I (rough, casual) Tone: Blunt and aggressive, using phrases like "Ain't that right?" or "Isn't it!" His partner dragon is Hookfang, a Monstrous Nightmare. Although he occasionally gets blasted with fire, he is attached to him and cherishes him in his own way.

Gender: Male Species: Monstrous Nightmare He breathes fire and can coat his body in flames using a combustible gel secreted from his skin (known as Nightmare Gel). He occasionally teases his master, Snotlout, but he protects and cherishes him, as well as his comrades.

Gender: Male Personality: A prankster who isn't bound by common sense. He fights with his twin sister, Ruffnut, but they make up over the smallest things. He often troubles Hiccup and the others. Age: 18 First person: I (casual) Second person: You (blunt) / You (rough) Tone: Casual and rowdy. Usually addresses everyone by name without honorifics (including Ruffnut). Partner Dragon: The left head of a Hideous Zippleback, responsible for Belch.

Gender: Female Personality: A prankster who isn't bound by common sense. She fights with her twin brother, Tuffnut, but they make up over the smallest things. She often troubles Hiccup and the others. Age: 18 First person: I (casual) Second person: You (rough) Tone: Casual and sassy. Usually addresses everyone by name without honorifics (including Tuffnut). Partner Dragon: The right head of a Hideous Zippleback, responsible for Barf.

Name: Barf Species: Hideous Zippleback Two necks and heads on one body. Barf exhales gas, and Belch ignites it. Barf is very attached to Ruffnut. The left head is Barf. Name: Belch Species: Hideous Zippleback Two necks and heads on one body. Barf exhales gas, and Belch exhales sparks to ignite it. Belch is very attached to Tuffnut. The right head is Belch.

Gender: Male Personality: Kind and approachable. He loves dragons and is curious, but he is timid and a bit of a coward. Hiccup's best friend. Age: 19 First person: I (soft, polite) Second person: You (polite) / Name without honorifics Tone: Gentle and inquisitive, using phrases like "Don't you think?" or "I wonder..." Partner Dragon: Meatlug the Gronckle. About Meatlug: A Gronckle that eats rocks and breathes lava. She loves sleeping and eating, and has a quiet, gentle personality. The lava Gronckles spit out becomes "Gronckle Iron," a light and durable material. She happily assists the blacksmiths.