Dragons who have no specific allegiance or affiliation.
A massive dragon who ruled the nest of the dragons raiding the Hooligan village. It forces them to bring it food, and if any them fail to bring enough to satisfy it, it eats them.
- Adaptation Name Change: In the books known as the Green Death. In the movie, it was a case of No Name Given; as such, this section was previously listed under the dragon's literary name. It was changed after the dragon was referred to as the Red Death in a couple of the animated series' episodes.
- Ambiguous Gender: It's referred to as male in the movie, but also called a "Queen", and referred to as female sometimes out of the movie. Its counterpart in the books was male. In general, fans mostly consider this one to be female.
- Bad Boss: It forces the other dragons to deliver food; if they don't, or fail to bring it enough, it will eat them instead.
- Big Bad: It's the one forcing the other dragons to hunt for it, which drives them to attack the Hooligan village. The rest of the dragons being able to co-exist with them in the second movie implies it eats more than all of them combined.
- Big Eater: Given its size that's inevitable. Since it decided getting food for itself was too much trouble, it had the other dragons in the first film get food for it, and from what seen of its raids, it eats enough food to feed entire communities.
- Breath Weapon: Like all dragons its got one, but its breath weapon is one based on making pyroclastic clouds. Nothing near it stands much of a chance, until our heroes get into the fight.
- Disney Villain Death: A variation. After Hiccup and Toothless lure the Red Death high into the sky, they torch holes through its wings and set it on fire from the inside before baiting it into a powerdive after them: only pulling up right at the last moment. Unable to stop due to both its gargantuan mass and moving Too Fast to Stop, it plows head-first into the ground and kills itself: its head exploding in flames on impact.
- Dragons Are Dinosaurs: The Red Death looks like an unholy cross between a turtle, an ankylosaur and a large theropod, is as big as Godzilla, and worst of all, it can fly. The overall cast of the monster gives the feel of a leftover primordial dragon, or perhaps even an ancient dragon deity.
- The Dreaded: The dragons are terrified of this thing and visibly shake in fear when delivering it food. When it gets up to fight up the vikings, they run away in fear not wanting anything to do with it.
- Establishing Character Moment: The first thing this draconian monstrosity does on-screen is swallow a Gronckle whole for not meeting its feed quota. It follows up that appetizer with an entire Hideous Zippleback - in one bite.
- Evil Is Bigger: This guy is the only out-and-out evil dragon and it's HUGE.
- Extra Eyes: Further emphasizing its monstrous appearance in comparison to the smaller, Ugly Cute dragons.
- Generic Doomsday Villain: While It Can Think, the screen time it has doesn't give much room for personality, so in terms of character it's little more than an aggressive giant animal looking for food.
- Genius Bruiser: It's smart enough to know it'd get more food by forcing other dragons to work for it. When the vikings try to escape it after they find its lair? It destroys the ships so they can't.
- When it loses track of Hiccup and Toothless in a cloud, it sprays fire in every direction, which does manage to hit Toothless' prosthetic tail fin.
- Giant Flyer: It's as big as a mountain.
- Greater-Scope Villain: It's the reason why dragons are feared and hunted down, and Hiccup's mission to bring peace between them and humans ultimately failed.
- Hidden Villain: As it never left its lair, the Vikings had no idea it even existed.
- Hive Queen: Lampshaded by Astrid, it appears to have some kind of influence over the dragons even at a distance. One scene implies this when Toothless appears to endanger the lives of Hiccup and Astrid by taking them neck deep into the heart of the dragons' nest for no other real logical reason. This also explains why the dragons don't just leave, because they have no choice. It might be an "Alpha" dragon, just like the two Bewilderbeasts in the second movie.
- It's All About Me: Doesn't care about the dragons giving it food and will eat them if they don't bring it enough to satisfy it.
- The Juggernaut: While the Red Death is chasing them, Hiccup and Toothless fly around, over and under large rocky outcroppings. The Red Death plows right through them. It makes its entrance at the climax of the movie through a hole made in the dragon's nest by the vikings catapults that wasn't big enough for it to fit through. It plows through the rock like it's not even there. It takes blowing it up from the inside to kill it.
- Kaiju: A dragon the size of a truck would generally be considered large in this setting. The Red Death can (and does) swallow those whole. In the books he eats a younger version of his own kind. Easy to believe, considering he considers normal dragons tasty snacks.
- Knight of Cerebus: Once it shows up, the film starts getting darker with The Reveal of why the dragons are stealing food which nearly drives a wedge between Hiccup and Stoick, to say nothing else of how it nearly killed the men who came to face it.
- Large and in Charge: The other dragons are like flies compared to it.
- Lightning Bruiser: It's astonishingly agile for its size when in the air, and turns surprisingly quickly, but it's still no match in that department to Toothless.
- Made of Explodium: Its breath is extremely flammable. Naturally, Hiccup exploits that to blow it up.
- Mighty Glacier: On the ground, it is rather slow and sluggish. However, it is not much of a disadvantage in the final battle, as the Vikings don't have anywhere to run to after it burned their ships. And when it takes into the air, it's faster than the looks.
- Mix-and-Match Critters: Body resembling turtle, tail like an ankylosaur, and has a head resembling a theropod, in addition to its bat-like wings.
- Monstrous Cannibalism: Perfectly willing to eat other dragons if given the opportunity, especially if they fail to bring enough food.
- More Teeth than the Osmond Family: While all the dragons have lots of teeth, it has a far more menacing set since it has a head like theropod.
- Names to Run Away from Really Fast: Assuming the thing doesn't reach your boats first.
- Nigh-Invulnerable: Catapults that managed to break down the side of mountain barely even warrant its attention, and even the explosion from Toothless' Breath Weapon, which had been seen breaking rock and steel, did little more than knock it down.
- Nonindicative Name: It's more of a sort of blue-grey in colour, though the name may be more to do with what happens whenever one shows up... A few rows of its unusual spikes are red in color as well. Maybe a similar case to the Yellow-Spotted Lizard, picking the least apparent feature for the name.
- Non-Standard Character Design: All the dragons in the first film have some cartoonish or outright goofy elements to their design. This thing has none, have a more monstrous dinosaurs like appearance.
- Obviously Evil: Looks more terrifying than the other, Ugly Cute dragons.
- One Dragon Army: The entire nest of dragons would rather run than stay in the same place as it, and the whole viking army couldn't scratch it.
- Orcus on His Throne: Is far too lazy to go looking for its own food, so it forces the dragons of the first movie to find food for it. It only bothers to get out of its lair when an army shows up on its door step.
- Spanner in the Works: To Stoick's entire plan to drive the dragons out of their nest, as he had no idea about this thing.
- Starter Villain: It is the first antagonist of the entire franchise, who is taken out by Hiccup and Toothless.
- Vacuum Mouth: Being as massive as it is, merely inhaling is enough to suck potential prey into its mouth, as it almost did with Astrid and Stormfly.
- Vile Villain, Saccharine Show: A movie lighthearted about a boy befriending a dragon, has a giant voracious murder machine as its main villain.
- Villainous Glutton: Implied. The dragons it forced to find food for it could comfortably be supported by the same Vikings they were stealing from, giving the hint that Red Death ate more than all of them combined.
Originally a baby Typhoomerang (a then-unknown dragon species) that Hiccup discovers, he eventually returns to his mother after a short misunderstanding. He later returns in "Zippleback Down", fully grown.
- The Bus Came Back: In "Zippleback Down".
- Flashback: How his true identity is revealed in "Zippleback Down".
- Gigantic Adults, Tiny Babies: When he was young, he was Terrible Terror-size. As an adult, he is larger than any academy dragon by two easily.
- He Is All Grown Up: In "Zippleback Down".
- Sibling Rivalry: Torch and Toothless can't stand one another. In "The Terrible Twos", Toothless resented Torch due to how much attention Hiccup was giving him. It got worse when he found out that his mother was looking for Torch, to which Hiccup mistook Toothless as hating him. However once Torch returned in "Zippleback Down", their rivalry seemed to have watered down, but only to where Torch will save Toothless if necessary. They will still bicker fiercely while in the presence of Hiccup.
- Took a Level in Badass: After growing to adult size Torch can carry three of the teens, Barf and Belch, and Toothless with ease. His firepower has increased as well.
An offshoot of the Whispering Death, the Screaming Death is five times the size and proportionately dangerous. It gets its name from its dragon-disorienting scream, specifically coined by Tuffnut. And this dragon is a complete unknown, with no entry into the Book of Dragons.
- Asskicking Equals Authority: Has the command over several Whispering Deaths and hands Berk its ass on a silver platter without so much as trying.
- Brown Note: Its scream causes other dragons to become disoriented while commanding the loyalty of the smaller Whispering Death.
- The Dreaded: In his second appearance, Astrid is terrified of it.
- Even Bad Men Love Their Mamas: The motivation for his rampage throughout the season is to find his mother. Its mother is also just about the only thing that keeps it in check - its surprise appearance in Race to the Edge had it either forget or not care that Hiccup and the other riders had helped it before. However, its mother did remember, and promptly got it to back off, despite being a fraction of its size.
- Expy: To the Red Death. Their names are similar, it has several dragons under its command, is quite large, can shrug off everything, and are antagonists. However, unlike the Red Death, the Screaming Death isn't strictly malicious and just wants to find its mother and be left alone - though it does have a monumentally bad attitude.
- Foil: To Toothless. While Toothless is Dark Is Not Evil, has a rider, and used to work alone, The Screaming Death invokes Light Is Not Good, has no rider, and commands its own dragons. In terms of combat, while they both have incredible power, Toothless tends to emphasize stealth and hit-and-run tactics, while the Screaming Death ignores all subtlety and just smashes anything that gets in its way.
- Giant Mook: It's a larger version of the Whispering Death.
- HeelFace Turn: Somewhat. Just not antagonistic anymore.
- It Only Works Once: When it returns it is no longer is attracted to the light, or at least learned to ignore it.
- Jerkass: Even after its sort of HeelFace Turn, it has an incredibly bad attitude.
- The Juggernaut: Smashes through rock formations without even trying and can easily shrug off bombardment from a dragon like Toothless. For context, even the Red Death flinched at Toothless' plasma blasts.
- King Mook: To Whispering Deaths, which it can sometimes command. Except for its mother, which puts it in its place.
- Large and in Charge: Its larger than its relatives and commands their loyalty.
- Lightning Bruiser: Very fast and agile, can demolish rock formations and even islands, fires like a machine gun, and shrugs off everything.
- Light Is Not Good: A pure-white dragon that is downright vicious.
- Made of Iron: Rams headfirst through a bunch of rock pillars and then headlong into a giant rock formation, the latter only managing to knock it out for a few seconds. The collapsing rock face damaged its much more fragile wings, however, but it wasn't going to let it stop him. As it gets bigger, it even no sells the types of rock formations that almost got it killed in its first appearance and causes them to shatter into enough pieces it does not have to worry about its wings. It also takes the combined attacks of at least twenty dragons and shows no wear or tear from repeated spine attacks, fireballs, and being rammed by Gronckles.
- Make Me Wanna Shout: The aforementioned Brown Note, disorienting dragons mid-flight while it screams. But fortunately, it does not cause sonic booms like the Thunderdrum.
- More Dakka: The Screaming Death shoots fireballs like a machine gun.
- More Teeth than the Osmond Family: Similar to the Whispering Death, but it doesn't have the Langolier-like mouth.
- No-Sell: Its scales are hard enough to fully protect it (and anybody who salvages them for armor) from arrows.
- Person of Mass Destruction: Can cave in and sink islands without breaking a sweat.
- Red Eyes, Take Warning: Fishlegs describes them as 'boring into your very soul', and there are worse descriptions for a dragon that is, at the very least, extremely destructive and incredibly bad tempered.
- Smarter Than You Look: Lampshaded by Hiccup when it realizes it was being distracted from destroying Dragon Island.
- Spike Shooter: Just like the Whispering Death, except they're spikes the size of spears.
- The Bus Came Back: Returns in a surprise one-episode appearance in Race to the Edge, where its scales get used as armor to defend against the Dragon Hunters' dragon root arrows.
- Took a Level in Badass: If it wasn't bad enough, it ends up bigger and near-invincible in its second appearance.
- Tunnel King: Just like its smaller counterparts. Except as it grows, its capable of bringing down entire islands from its tunneling.
- Weakened by the Light: Played with. Despite being albino, it is attracted to light, instead of retreating from it. But, as Hiccup figures out..."Attracted to the light? That can be a weakness, too!"
Heather's Razorwhip dragon. She is a sharp class and has a lot in common with Deadly Nadders including throwing tail spikes, but looks a lot sleeker and seems to have a coating of metal all over her body.
- Absurdly Sharp Blade: Her tail spikes are sharper than anything man made.
- Extra-ore-dinary: Her body is covered in metal including her tail spikes that she can shoot. Heather has turned some of the spikes into bits of armor for her arms and sholders.
- Meaningful Name: Explained by Tuff, she "rides like the wind, shearing through it."
- Morality Pet: Hiccup is able to use Heather's love of Windshear to get the girl to stop acting so suicidal.
- Not Good with People: Razorwhips are reclusive by nature, so Windshear has a difficult time adjusting to life on Dragon's Edge due to having to deal with people and dragons who aren't Heather on a regular basis.
- Recruitment by Rescue: A non villainous example, Heather found Windshear after the dragon had been injured and Heather nursed her back to health, afterwards the two became inseparable.
- Spike Shooter: Like the Nadder, Razorwhips are able to shoot tail spikes.
- Uncatty Resemblance: She's skittish and has a hard time trusting people, but is a fiercely loyal friend if she does, just like Heather.
A green Gronckle picked out to be Dagur's mount.
- Keet: Shattermaster is very energetic.
- Morality Pet: Besides Heather, Shattermaster also helped Dagur change for the better.
- Papa Wolf: He's also shown to be quite protective of Dagur, as seen when Astrid threatened to harm his rider if he betrayed them.
- Undying Loyalty: To Dagur, actually willing to fight other dragons if they threaten him. The Riders are genuinely surprised by how quickly the two bonded.
- The Bus Came Back: Makes a cameo in Dagur's wedding.
- What Happened to the Mouse?: Disappears entirely in Season 5 of Race to the Edge.
A Triple Stryke captured by Ryker and forced to fight in an arena. After being freed by the Riders he followed them to The Edge before bonding with Dagur.
- Ascended Extra: Becomes Dagur's mount in Season 7.
- Animal Motifs: The tails and pincers are strongly reminiscent of a scorpion, while the color scheme seems more like a wasp.
- Beware My Stinger Tail: Three tails that end in scorpion stingers. He can hold them together to act like a single tail.
- Breath Weapon: Fire, though he prefers to get up close and use his tails.
- Bright Is Not Good: He has a bright yellow and black color scheme. Averted after he is freed from the arena.
- Defeat Means Friendship: A bit of a tricky example. After being defeated and freed he happily leaves with the riders, but remains hostile due to his experiences with humans. He doesn't become a true ally until the riders manage to start training him.
- Red Eyes, Take Warning: Bright red eyes and first appeared as a vicious area combatant.
- Uncatty Resemblance: Just as vicious and unpredictable as his rider, Dagur. As well as starting off as an enemy before becoming an ally.
- What Happened to the Mouse?: His introduction episode ends with him following the riders back to their base, with Hiccup promising that he'll like it there. He isn't seen until next season, where it's revealed that he's been roaming the island and avoiding the riders. The season after that, he has become Dagur's mount, amicably shoving his previous dragon, Shattermaster, into this role.
A trio of young Thunderdrums that start wreaking havoc across Berk. After attempts to train them fail, Stoick releases Thunderdrum so that he can watch over them.
- Ridiculously Cute Critter: As with all baby dragons in the franchise, these three are basically chibi versions of Thunderdrums and are thus quite adorable.
- Sidekick Creature Nuisance: Though cute, they're also extremely noisy and cause many problems for the inhabitants of Berk while they're around.
- The Bus Came Back: In the School of Dragons game, they're discovered locked in the hold of the Reaper and along with Thunderdrum move into the school. They also accompany Thornado when answering the call of the Bewilderbeast.
A Deathsong the Dragon Riders hatch out of an egg and raise, before leaving it with the adult Deathsong on Melody Island after he becomes too much of a hassle.
- Badass in Distress: Hiccup and Astrid find him badly wounded after a tussle with the dragon hunters.
- The Bus Came Back: Returns around a season after his initial appearance, fully grown and extremely injured after a run in with Krogan and his dragon hunters. He came back in season 6 and plays a role in the series finale.
- Platonic Life-Partners: With Stormfly, who even becomes immune to his song.
- Ridiculously Cute Critter: Young Garff is very, very cute.
- Sidekick Creature Nuisance: However, similar to Bing, Bam and Boom, he's also extremely loud and keeps trying to prey on Chicken, Smidvarg and the other Night Terrors.
A member of the subterranean colony of albino Night Terrors that Fishlegs discovers. Darkvarg bonds specifically to Fishlegs and is the only one to not turn on him when he tries to leave.
- The Bus Came Back: Returns when Fishlegs wanders back into the Night Terror caverns when trying to escape Krogan's Dragon Flyers. This time around, he's managed to become leader of all the other Night Terrors and siccs them on the Flyers at Fishleg's command.
- Token Good Teammate: The only Night Terror actually loyal to Fishlegs, to the point of working against the others when they try to stop Fishlegs from leaving.
- Undying Loyalty: To Fishlegs.
A Scauldron the Riders find beached and go to great lengths with rescue, causing it to bond with Ruffnut in the process.
One of the Changewings that arrives on the Edge for the annual Changewing migration, Tuffnut frames it to make it look like it ate him in order to fake his death so that Ruffnut would feel free to marry Throk. Ruffnut instead paints a picture of Tuffnut on its chest, names it Snuffnut, and declares to remain with it forever, leading to Throk trying to tame it.
- Badass in Distress: Despite being the episode's Monster of the Week along with the other Changewings, they turn on him when his invisibility is ruined by Ruffnut's painting, forcing the Dragon Riders to try and save him.
- Fall Guy: Gets framed for Tuffnut's death, leading the others to think it ate him.
- Spanner in the Works: The painting of Tuffnut on his chest foils his camouflage, causing the other Changewings to shun him. This in turn is a spanner in the Riders' attempts to drive the Changewing migration on to the next island since they won't leave without Snuffnut, but refuse to travel with him either.
A Whispering Death trained by Alvin, she is also the mother of the Screaming Death. After the Dragon Riders release her, she and the Screaming Death retreat to a remote island to live in seclusion.
- All There in the Manual: Her name is only known from supporting material.
- Big Damn Heroes: Remembers Hiccup, Toothless, Snotlout and Hookfang from when they saved her from the Outcasts, leading to her defending them from the Screaming Death, who has forgotten this.
- The Bus Came Back: Makes a surprise reappearance, along with her monstrous son, in Race to the Edge.
A Razorwhip baby that confuses Ruffnut for Wingmaiden, resulting in her having to train to become one.
A Light Fury who is introduced in the third movie and becomes Toothless' mate.
- Babies Ever After: Has three babies with Toothless by the end of Hidden World.
- Changed My Mind, Kid: She's had next to no positive experiences with humans. She can carry one to safety, though.
- Character Development: The Light Fury starts off as understandably distrustful towards humans since she was kidnapped by trappers, then given to Grimmel to use as bait. Her interactions with Hiccup and Astrid (especially the former) has her trying to kill them thinking they were dangerous. However, after seeing Hiccup's selflessness to protect Toothless, the Light Fury returns the favor to save him. And in the epilogue, while she still won't let a human ride on her, she comes to trust Hiccup, and by extension, his family to be around her mate and offspring.
- Dark and Troubled Past: How she ended up imprisoned by trappers is not touched upon, but it increased her distrust of humans.
- Female Feline, Male Mutt: With Toothless. Behaviorwise, Toothless has always been more or less both a dog and cat. The Light Fury, on the other hand, is 100% cat.
- Honey Trap: Zigzagged. Grimmel releases the Light Fury because he knew that Toothless would be attracted to her, and that Furies mate for life. However, unlike most examples of this trope, the Light Fury has no loyalty to Grimmel and is unaware of his plans. And she does become mutually attracted to Toothless, but her following him back to New Berk does allow Grimmel to briefly capture her, Toothless, and every Berk dragon.
- Interspecies Romance: With Toothless, a Night Fury. DeBlois commented that the Light Fury is not actually a Night Fury, just a similar related species. This doesn't stop Toothless from courting her, and later, their mutual attraction.
- Light Is Good: As a Light Fury, she has white scales. And while she's hostile towards humans, it's not without reason. And she's shown to be protective and caring of Toothless.
- Masculine Lines, Feminine Curves: With Toothless, who has straighter and more angular features; whereas she is softer and rounder in appearance.
- Neutral No Longer: For most of the film she distances herself from all humans - both the hunters who enslaved her, and the tamers of Berk. Notably, she is one of the few dragons in the series to never have a rider. But when she sees Hiccup sacrificing himself so she can save Toothless, she flies off to catch him before he hits the water.
- No Name Given: Justified. DeBlois commented her lack of a name is a stylistic choice to symbolize her wildness.
- Pale Females, Dark Males: With Toothless. While he's a black Night Fury, she's a white Light Fury.
- Pink Means Feminine: Under certain lighting conditions, she sports pink stripes.
- Straight Man: Compared to Toothless' lovestruck enthusiasm and ignorance of Fury ways.
- Violently Protective Girlfriend: When she thinks that Hiccup is harming Toothless, the Light Fury snatches him from the latter's back and tosses him into the ocean.
A trio of Night Lights who are the hybrid offspring of Toothless and the Light Fury.
- All There in the Manual: Their names are spoken in the RPG-style game School of Dragons.
- Intrigued by Humanity: Unlike her brothers who loaf about, Dart is endlessly curious about Hiccup and the vikings, much to her mother's dismay.
- Outnumbered Sibling: Dart is the only female with two brothers.
- Patchwork Kids: They are a mixture of both Night and Light Fury dragon species.
- Sleepyhead: Ruffrunner tires easily and has a habit of falling asleep.
- Women Are Wiser: Dart is more reckless than her brothers, but also far more intelligent and curious; the latter are only interested in squabbling and sleeping.
Deathgrippers are venomous, predatory dragons under the command of Grimmel.
- Acid Attack: They can spit acid out of their mouth.