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A powerful tribe which held a superior position on the negotiating table for many years. They are widely feared and respected for their battle prowess, and generally are considered one of the more powerful forces. The Berserker crest is a depiction of a Skrill.

  • Badass Army: The prevailing example of the trope In-Universe, with Berk making great pains to avoid provoking them. However, under Dagur's leadership the Berserkers face numerous defeats and Berk becomes more confident in being able to battle them.
  • The Berserker: It's in their name, after all.
  • The Dreaded: Stoick takes great pains to avoid a war in Twinsanity.
  • Fluffy Tamer: Berserkers used to harness and control Skrills, although given Dagur trying his hand at it in A View To A Skrill, there was less fluffy taming and more dragon enslaving. Skrills also serve as their crest.
  • Make Way for the New Villains: They take over as the main antagonistic faction in Defenders of Berk after Dagur defeats Alvin.
    • This gets inverted for them in Race to the Edge where their roles are gradually taken over by the Dragon Hunters.
  • Proud Warrior Race Guy: Far more into it than Berk is, though under Oswald they rarely launched invasions.

    Dagur the Deranged
Dagur's appearance in Race to the Edge.
Click here to see Dagur's appearance in Riders of Berk and Defenders of Berk
Voiced by: David Faustino

The leader of the Berserker tribe who is known for his insane personality.

  • Amazon Chaser: He becomes engaged to Mala in "Mi Amore Wing" and has commented on how he likes it when she hits him.
  • Ambiguously Bi: While he does eventually marry Mala, the only other person he has any interest in is Hiccup.
  • Antagonistic Offspring: Implied to have been this offscreen for his dad before murdering him. Subverted as of Season 5. Oswald disappeared and Dagur claimed to have done this in order to avoid looking like a weak successor.
  • Arch-Enemy: Regardless which villain is the current Big Bad, Dagur is consistently the biggest thorn in Hiccup's side, something that Dagur himself takes great joy in.
  • Ax-Crazy: Dagur has the title "Deranged" for a very good reason. He's a raving psychopath who regularly tries to start wars, sadistically hunts dragons, butchered Heather's entire village, and killed his own father, all for fun. On his return in Season 5, he's pulled a full on Heel–Face Turn, mastering his anger... mostly. He's still got the crazy inside him, he's just much better at controlling it.
  • Badass Beard: He becomes a much more formidable opponent and, later, ally after a three year time skip and growing one of these in the Outcasts prison.
  • Bad Boss: Regularly abuses his henchmen, with throwing them overboard a ship and crushing their hands being just a few of his methods. Character Development transformed Dagur into a Benevolent Boss and The Good King.
  • Beard of Evil: Grows one in the Time Skip between Defenders of Berk and Race to the Edge. Doubles as a Time-Passage Beard, a Beard of Barbarism and arguably, a Badass Beard.
  • The Beastmaster: Manages to control the Skrill to some degree. Gains some more of this after being stranded on a dragon filled island.
  • Big Bad: In A View to a Skrill, he seemingly killed Alvin and usurped control of the Outcasts, making him the primary antagonist of the series as a whole until Viggo Grimborn shows up. He later pulls a Heel–Face Turn, ceding the role to Viggo.
  • Big Brother Instinct: His one redeeming trait prior to his genuine heel face turn is his protectiveness over Heather.
  • Blood Knight: He is eager to fight and by ''eager' we mean "looking for any excuse to declare war". He brings an armada with him everywhere just in case, and claims there's fifty thousand soldiers in it, going so far as to bring the armada to hunt dragons with him on Dragon Island later on.
  • Broken Pedestal: Of a very strange sort with Hiccup. After "Twinsanity" where he sees Hiccup fighting "a Night Fury", he comes to see Hiccup as this awesome Viking who succeeded against something no Viking had ever before won. When they meet in "The Night and the Fury" he wants to kill a Night Fury together with Hiccup, going so far as to call Hiccup his "brother." Upon learning Hiccup had deceived him and was no longer killing dragons but training them, he goes back to hating Hiccup but on a more personal level.
  • Bunny-Ears Lawyer: After his turn to the good side, Dagur reveals a surprising amount of talent in dragon-training. He does so while holding one-sided conversations with them.
  • The Caligula: They don't call him "Dagur the Deranged" for nothing. He grows out of it.
  • Card-Carrying Villain: It's right in his title, Dagur "The Deranged". He grows out of it in Season 5. Somewhat.
  • Character Development:
    • Dagur was something of a Dirty Coward in Defenders of Berk, but toughens up by Race to the Edge.
    • In a more general example, he starts off as an easily angered, destructive, sociopathic-like antagonist against Hiccup and the dragon riders. But after learning Heather is his sister and saving her from being hurt by Viggo, he goes off on his own and do some thinking. And the next time he and Hiccup meet, Dagur has totally changed. He's learn to control his anger which allows him to become nicer. He even becomes a dragon rider.
    • Following from the above, Heather's influence also helped Dagur want to be a chief who leads with reason instead of violence.
  • Character Tics: Whenever Dagur is angry or annoyed, he sings a song to help him calm down.
    "I am the sea, calm and wide, my sense of peace comes from the inside."
  • Deadpan Snarker: Occasionally, and with increasing frequency in Race to the Edges. In Dragon Eye of the Beholder Part I, he remarks (about the other dragon riders), "still haven't got rid of the Greek chorus, I see."
  • Demoted to Dragon: Becomes Viggo Grimborn's subordinate in the latter half of Race to the Edge. This doesn't last, as Dagur promptly turns on him when he realises Grimborn considers him and Heather expendable.
  • Dirty Coward: He never goes anywhere without the Berserker armada close at hand and in the season two finale, he begs Hiccup for help when Alvin captures him. He's outgrown this by Race to the Edge, as part of his generally stepping up.
  • Easily Forgiven: To an extent in the second half of Race to the Edge. Most egregious with Heather, whose adopted parents had been murdered by Dagur - or at least, his soldiers (just what happened is rather unclear) - yet as of Gold Rush she's off looking for Oswald with him. On the other hand, despite several proofs to the contrary, she consistently suspects up to that point that he's ready to step back through the Heel–Face Revolving Door. However, most of the Riders regard him with definite suspicion, and their unwillingness to trust him leads to his Heroic Sacrifice. He survives, but it looks very much he doesn't.
  • Embarrassing Nickname: He was mockingly nicknamed "Dagur the Dainty" by his childhood bully, Anson.
  • Even Evil Has Loved Ones: Even prior to his Heel–Face Turn, he genuinely cares for his sister, Heather, threatening Ryker with death if he hurts her and going out of his way to save her life in Maces and Talons: Part 2.
  • Even Evil Has Standards:
    • Hates traitors, even those who work for him.
      "I hate traitors."
    • He dislikes Dragonroot arrows for being cheating.
    • It's revealed that he did not kill his own father, though he had no problem letting everyone think so. He also would not kill his own sister Heather, even when she tried to kill him.
  • Evil Counterpart: To Hiccup. They are both sons of Viking Chiefs, but while Hiccup is intelligent and compassionate, Dagur is psychotic and brutish. While Hiccup respects his father and seeks to earn his approval, Dagur utterly despised his father (to the point of killing him) and often insults his memory. Ironically, Dagur considers Hiccup to be very similar to himself. As it turns out, they're more similar than they appear, especially after Dagur becomes considerably more calculating (and thus, more dangerous) in Race to the Edge, and later following his Heel–Face Turn, he takes on a degree of Hiccup's All-Loving Hero nature.
  • Evil Redhead: He has bright red hair and is a complete sociopath. Until Season 5.
  • Evil Laugh: He tends to have long, slightly creepy laughs. Considering his mental state, he might be considered Laughing Mad.
  • Evil Plan:
    • He thinks Berk is hiding an army of dragons; he wants to find it for a pretext of declaring war on Berk.
    • He later comes up with a number of these, and they get better and better as time goes on.
  • Fatal Flaw: Dagur's biggest flaws that end up hurting him the most is his pride, impulsiveness, and not thinking through his strategies.
  • Faux Affably Evil: To the rare person he respects or considers family, he gives off an air of brotherhood and friendliness. Unusually for this trope it appears he's actually trying to be sincere, but fails due to how clearly unhinged, obsessive and treacherous he is even to people he likes. His welcoming attitude towards Heather, who is actually family to him, is even creepier due of how sincerely he tries to give it even after what he did to her adopted family. As with his other negative traits, he outgrows it.
  • Fiery Redhead: In the first two seasons brief shots of the braid sticking out from under his helmet show he has red-ish hair. Starting from Race to the Edge, he's sporting some kind of faux-hawk undercut thing.
  • Flaunting Your Fleets: Never travels anywhere without his Armada to back him up.
  • For the Evulz: Practically every crime Dagur commits is for his own sick amusement.
  • Generation Xerox: His father started out as 'Oswald the Antagonistic' and later became 'Oswald the Agreeable,' which mirrors Dagur's character arc.
  • Genius Bruiser: Dagur is an accomplished warrior, but has proven to surprisingly crafty.
  • Good Feels Good: "Family on the Edge" has Dagur try to redeem himself, and to his credit, he does end up getting along with most of his former enemies. Furthermore, it actually sticks.
  • Good Scars, Evil Scars: Post-Time Skip, he has a pretty nasty one on the right side of his face.
  • Good Taming, Evil Taming: In Defenders of Berk, Dagur tries controlling the Skrill by tying him to ropes and making it destroy things on command, only for the Skrill to electrify him and flee as soon as it is free. He eventually learns to train dragons under Hiccup's instructions, gaining the mutual loyalty and friendship of a Gronckle he named Shattermaster. In the Shellshocked episode, Shattermaster gets injured in the fray, but Dagur joins forces with Sleuther in order to defend him, with Sleuther eventually becoming Dagur's full-time mount.
  • Hair-Trigger Temper: Very quick to anger. A long time stranded on an island leads to him actually taking up meditation to control it.
  • Heel–Face Turn: To everyone's immense surprise and total skepticism, in Season 5, after a long time marooned on an island.
  • Heroic Sacrifice: Possibly. In Season 5, he repeatedly tries to tell Hiccup that he's flying into a trap in raiding Viggo's ship yard, then escapes to trigger the trap and is last seen charging into the smoke to try and take out the rest of the fleet. One of his throwing knives is seen falling into the water. Season 6 reveals that he's alive.
  • Horny Vikings: His helmet in the first two seasons could make Loki envious.
  • Hypocrite:
    • He says he doesn't like traitors yet he has no problem with keeping Savage, who has clearly gone from Outcast to Berserker, as his right hand.
    • He hates it when people give him nicknames, but gladly gives them to others.
  • Hot-Blooded: A consistent part of his personality.
  • In Love with Your Carnage: Somewhat. He mentioned to Hiccup that he couldn't stop thinking about him and how well he handled Toothless (thinking it was a wild Night Fury) and mentions how he thinks he should kill Stoick to become chief, before getting pissed when he learned the truth. He still seems to be this in Race to the Edge.
  • Jabba Table Manners: Averted in that he despises people who smack their lips while eating, and threatens to remove Tuffnut's legs for doing so. The only reason he doesn't is because Tuffnut impresses him with a poem.
  • Jerkass: The guy is one enormous prick, as well as being extremely unhinged, to put it mildly.
  • Jerk with a Heart of Gold: After his Heel–Face Turn and Character Development, while Dagur still retains some temperamental issues and rudness, he is a lot more nicer.
  • Knife Nut: Finds enjoyment in throwing knives at Hiccup. Throws a Hel ton of them at Hiccup in The Night and the Fury.
  • Love at First Punch: How Mala describes their relationship — "It was love at first fight".
  • Luke, I Am Your Father: Heather is his sister. He's just as surprised to learn about this as she is, but he welcomes her with open arms even though she tried to kill him only a few minutes before (and kept the invitation open even after she rejected it).
  • Major Injury Underreaction: Seems to have an extremely high pain tolerance. Twice, he gets shot with an arrow. The first, he only notices it because the poison on it knocks him out. For the second, he doesn't notice until someone else points it out and he still doesn't react with any sort of pain or even pull it out of his back.
  • Manipulative Bastard: Evolves into this in Race to the Edge, and though he's not on Viggo's level, he's dangerously good at it.
  • Meaningful Name: With a bit of Bilingual Bonus to boot - his name sounds similar to draugr, a vengeful undead from Norse mythology (on top of sounding kinda like "dragon"). It is also similar to the English word "dagger", which is fitting for a Knife Nut character.
  • Mood-Swinger: He can go from gleeful, to enraged You Have Failed Me directed at his men, to crazy Evil Laughter, and finally to nonchalant snark, all in the span of under a minute.
  • Motor Mouth: To go with his mood swings, he often dominates conversations (including with inanimate objects or dragons), and changes between formal heightened speech, and the standard casual tone of the other teens.
  • Mysterious Informant: Might have one of these since he knew about the domesticated dragons.
  • Names to Run Away from Really Fast: In a stark contrast to his father.
  • Never Speak Ill of the Dead: Stoick was close to flipping out and murdering him because he was constantly berating his father, even under the threat of a war. Considering he was seeking war, and his surprising amount of intellect, it was likely on purpose.
  • No Indoor Voice: He is rarely heard below shouting level.
  • No Sense of Personal Space: He often hugs people too tightly and without warning. Strangely, his affection does seem to be genuine—it simply isn't returned by anyone he likes until well after he turns to Hiccup's side.
  • Offstage Villainy: Besides what he did to his father, Oswald the Agreeable, which it turns out that he was lying about so he could take over the tribe he also attacked and butchered nearly everyone in Heather's village at some point after breaking out of prison.
  • The Only One Allowed to Defeat You: Gives this order about Hiccup after the events of "The Night and the Fury."
  • Papa Wolf: Becomes extremely protective towards his Gronckle dragon, Shattermaster. He even works with the dragon hunters to find a clue as to where they kidnapped Shattermaster.
  • Pretext for War: His goal is to find one, just for the sake of war. As of "The Night and The Fury", he has it now that he knows that Berk has dragons.
  • Psychopathic Manchild: He's about the same age as Hiccup or older and throws violent tantrums when he doesn't get his way.
  • Reformed, but Rejected: In Season 5. He proves his benevolent bona fides by repeatedly saving Hiccup and Toothless and performing a Heroic Sacrifice to trigger a trap set up by Viggo. To his credit, he understands why his enemies don't trust him.
  • Rewarded as a Traitor Deserves: Does so to one guard in Eye of the Beholder: Part One who was also the one who set him free.
    Guard: I'm the one who freed you!
    Dagur: Which makes you a traitor. (BONK!) I hate traitors. (Slasher Smile)
  • Sanity Slippage: He's starts off crazy and gets even worse after being shipwrecked and stranded alone on an island after betraying Ryker. On the other hand, his appearance after that in "Family on the Edge" shows that his sanity has largely improved.
  • Screaming Warrior: Quite often, but most notably in 'The Night and the Fury' where, mid-conversation (albeit one about hunting dragons), he drops to all fours and howls like a wolf in excitement. Hiccup is quite disturbed, even moreso when Dagur asks him to join in.
  • Self-Made Orphan: It's heavily implied that he killed his father, as he says he "retired," repeatedly refers to him in the past tense, and (most tellingly) does a mock impression of his father cowering while telling Dagur to put down the axe. Implied no more in "The Night and The Fury" where he mentions 'disposing' his father and being willing to do so to Stoick so Hiccup could take control. And then "Family on the Edge" reveals this isn't true, but Dagur did let everyone think he had killed his father as to not look weak. Season 6 reveals that he's been looking for his father, later with Heather's help, and Oswald died defending dragons after being marooned.
  • Shipper on Deck: He seems aware of Hiccup and Astrid's attraction to each other, given this line.
    "Relax, blondie! I was just trying to talk some sense into your boy Hiccup here!"
  • Sibling Yin-Yang: With Heather. He's violent, crazy, and an antagonist to the riders; she's peaceful, sane, and an ally to the riders.
  • Significant Green-Eyed Redhead: He has bright green eyes, fiery red hair, and acts as a recurring villain, and later Big Bad, for Hiccup.
  • Slasher Smile: A surprisingly creepy one for a kids show.
  • Smarter Than You Look: Though undoubtedly an Ax-Crazy lunatic, his conversation with Hiccup in Twinsanity, along with his knack for outsmarting the Riders throughout the series, shows that Dagur is far more savvy than his brutish tendencies would suggest. Following the time skip, he progresses into a fully fledged Manipulative Bastard, with a particular knack for playing Hiccup. While he's not on Viggo's level, he's good.
  • The Sociopath: Even though The Berserkers are mentioned to be psychotic in battle, they're all well-mannered compared to this guy. He overcomes this in Season 5, having spent a long time marooned on an island reflecting on and consciously restraining his violent impulses.
  • Stab the Scorpion: Throws a knife past Hiccup that sets off a trap behind him.
  • Suddenly SHOUTING!: Quite often.
  • Tattooed Crook: He has two tattoos of three lines like claw marks, one across his left eye and the other on his upper right arm. He's also a recurring antagonist for Hiccup.
  • Teens Are Monsters: He appears to be a teenager, is batshit insane, is known to have been rude to Hiccup and others, and is stated to have killed his father.
  • Terms of Endangerment: Loves to refer to Hiccup as his "brother". Upon finding out Heather is his biological sister he refers to her as "sister" in the same way, then taking it one step further to give her the moniker Heather the Unhinged. To be fair, it does kind of fit.
  • Took a Level in Badass: Becomes significantly more dangerous following the three year time skip.
  • Took a Level in Kindness: Discovering Heather is his sister was the first step that would change Dagur into a more heroic and kind-hearted person.
  • Ugly Guy, Hot Wife: While "ugly" might be a little much, Dagur's features are much more exaggerated and cartoonish compared to Mala's.
  • We Can Rule Together: Delivers one to Heather after discovering that she is his sister.
  • Would Hit a Girl: He shows no qualms about fighting and/or possibly killing a female as his fights with Heather and Astrid show.
  • Young and in Charge: The same age as Hiccup and is already the chief of his tribe.

Heather as a young adult.
Click here to see Heather as a teenager. 
Voiced by: Mae Whitman

A girl that washes up on the beach of Berk and is taken in by the riders. She's a spy for Alvin to learn the secrets of dragon taming. She does this because Alvin has her parents. She appears again in season three, this time as a full Dragon Rider.

  • Action Girl: She gains battle skills within three years and is able to hold her own against much more experienced warriors. She also made herself a double-handled axe to use in close combat.
  • Action Girlfriend: Heather is the badass girlfriend to the geeky Fishlegs in Race to the Edge seasons 3, 4 and 5.
  • Aloof Big Sister: Inverted and justified. For the former, she's Dagur's younger sister, but is initially cold and aloof towards him. For the latter, her attitude is understandable given how he and his men destroyed her home, which led to her adoptive parents' deaths.
  • Apologetic Attacker: She apologized to Bucket after knocking him out to escape.
  • An Axe to Grind: Gains one in Race to the Edge, which is also able to deploy into a double-handled version. Looks to be made of some of Windshear's scales.
  • Berserk Button: Dagur. When she learns that Hiccup has been teaching Dagur dragon-training, she is furious and refuses to believe that he has reformed.
  • Bitch in Sheep's Clothing: Subverted: during both of her times as a mole, she's a sheep acting like a bitch acting like a sheep.
  • The Bus Came Back: She met and left the riders early in season one, she wouldn't appear again until Race to the Edge.
  • But Now I Must Go: Despite having an open invitation, she takes off after learning that the person she hates most in the world is also her brother. The door is open for her to return, however.
  • Canon Foreigner: Heather doesn't exist outside the TV-series. She is an original character created specifically for the TV-Series by Art Brown and Douglas Sloan. She has otherwise never been acknowledged in the movies or specials.
  • Conveniently an Orphan: Says her parents aren't with her because they died in a pirate attack. Turns out, they were being held hostage by Alvin to force her to be The Mole. Becomes Harsher in Hindsight when, upon her return in Race to the Edge, we learn they died when Dagur attacked her village.
  • Crying Wolf: No one believes her when she says Alvin had her parents because of her stealing the book.
  • Darker and Edgier: Her appearance in Race to the Edge - Astrid even refers to it as such by name. She goes from a sweet girl coerced into manipulating the heroes to an Anti-Hero willing to wipe out ships and personally kill her enemies to get vengeance.
  • Double Weapon: Her axe that can be unfolded into a double axe headed staff.
  • Dragon Rider: Some point after she left in season one Heather found Windshear who had been injured battling a Typhoomerang, the two bonded as Heather nursed her back to health.
  • Dude Magnet: Fishlegs and Snotlout took a great liking to her right away.
  • Even the Girls Want Her: If Ruffnut's Ambiguously Bi flirting in Race to the Edge can be taken seriously.
  • Face–Heel Turn: She joins Dagur in the second season of Race to the Edge. Though, actually, she's The Mole.
  • Feminine Women Can Cook: Averted in that she's a badass who can hold her own fighting Astrid, and in "To Heather or Not to Heather" cooks for the other Dragon Riders. When she finally decides to stay with them, Tuffnut replies "I thank you, and my palate thanks you as well."
  • Hairstyle Inertia: She kept the same the braided hairstyle from her youth. It's even on the same side.
  • Happily Adopted: She is revealed in her second appearance to be adopted, and as had already been established will do anything to keep her parents safe. Takes a dark turn in Race to the Edge when we learn that the reason she is so angry and bloodthirsty is because Dagur killed her parents.
  • Head-Turning Beauty: Shortly after meeting the Dragon Academy she has Fishlegs, Snotlout and (debatably) Tuffnut vying for her attention.
  • Heel–Face Revolving Door: Her appearances have her alternately befriending the Dragon Riders and betraying them. Admittedly she is always good, the first time she was being coerced, the second time she was trying to not let the Riders get involved in her problems, and the third time she was undercover when the Riders happened to meet up with her.
  • Heel–Face Turn: Saves the Berk crew at the end of her two-parter.
  • Heroic BSoD: She breaks down and seems to tune the world out upon learning that Dagur is her brother. When Dagur's ship begins to sink, she almost doesn't even try to leave and save herself at first.
  • Hoist by His Own Petard: Female example. Once she's revealed to be working for Alvin, no one believes her when she starts telling the truth about why.
  • Honey Pot: Her mission from Alvin is to charm the boys and learn about dragons from them.
  • Honorary True Companion: She is considered this for the Riders come Race To The Edge but for whatever reason refuses to join up with them permanently. Given that she's original to the TV series and thus absent from the movies, Heather not officially joining the team is a Foregone Conclusion every time.
  • The Ingenue: Naive and innocent and playing the boys for suckers by pretending to be so. Astrid calls her on the 'innocent routine'.
  • In the Blood: After discovering that they're siblings, Dagur claims that her willingness to use brutal measures against him is because of her Berserker blood. The comparison clearly doesn't have a good effect on her. She eventually comes to accept it.
  • In the Hood: In Race to the Edge, she now wears a short sleeved hooded shirt.
  • Jerk with a Heart of Gold: Zigzagged. Heather is genuinely good at heart and has a strong moral compass, but at her worst (often when pushed to her limit) can be selfish, secretive, closed-off, two-faced, sly, untrustworthy, and insensitive. Each of these traits surface during her first few appearances in the series until she mostly outgrows them from the third season of Race to the Edge onward:
    • Her actions taken to save her adoptive family (Riders of Berk) and her time as an undercover hunter (Race to the Edge) see her being capable of lying to people (especially Hiccup and his friends) that proved to be worthy of her trust. Though she can be reluctant about it, she was also willing to mislead, guilt-trip, abuse their trust, and hurt them (emotionally) to further her personal agenda (for the latter, her reasoning for most of these actions was keeping the rest of the riders out of as much danger as possible).
    • During "Heather Report", her attempts to steal and deliver the Book of Dragons to the Outcasts in exchange for her parents puts innocent people she didn't know in danger. In a slight reversal, she ends up becoming a vigilante for justice by returning stolen loot from pirates to their rightful owners (albeit some of the pirates and traders counted as innocent people).
  • Luke, I Am Your Father: She's Dagur's sister. She finds this out right as she's on the cusp of killing him in cold blood for murdering her adopted family and tribe, and takes the reveal badly. Amusingly, the show initially attempts to fake out the audience by implying she's Hiccup's sister. Eventually, she comes to accept it, with Dagur's Heel–Face Turn.
  • Mama Bear: Inverted. Heather tried to steal the dragon book for Alvin because he threatened to hurt her parents if she didn't. She also wanted to go after Dagur for being responsible for their deaths.
    • She plays it straight in "Tone Death", being the first rider to bond with Garff positively and insisting that the rest of them not give up on raising him.
  • The Mole:
    • A spy planted by Alvin to learn about dragon training.
    • In the second season of Race to the Edge, she spies on the Dragon Hunters.
  • Morality Pet: Prior to his Heel–Face Turn, she's the sole person Dagur the Deranged genuinely cares for.
  • Original Character: She doesn't exist in the movie trilogy.
  • Put on a Bus: Heather left to Vanaheim alone to say her farewells to Oswald, keeping her out of the action for most of Season 6.
  • Retcon: Debatable but implied, perhaps to make her forgiveness of Dagur easier to accept. Dagur having killed her adoptive parents is never mentioned in later seasons, her anger toward Dagur instead being stated to be due to the belief that he killed Oswald the Agreeable and "set her adrift." She is similarly presented as if she never knew any family before she got close to Dagur.
  • Roaring Rampage of Revenge: Heather will stop at nothing to get revenge on Dagur for destroying her village and killing her parents. She eventually moves past it.
  • Romantic Two-Girl Friendship: After the ordeal with Alvin, Astrid and Heather become very close pretty quickly. During Heather's two part return in season three the two are inseparable and when Heather leaves Astrid is the one to try and convince her to stay.
    Astrid: ...You have support here, and I'm here.
  • She Is All Grown Up: Heather has grown up into a more Darker and Edgier person and Astrid really likes it.
  • Shipper on Deck: Ships Astrid and Hiccup, as she's well of the mutual attraction between the two and often gives the former advice on admitting her feelings for the latter.
  • Sibling Yin-Yang: With Dagur. She's peaceful, sane, and an ally to the riders; he's violent, crazy, and (initially) an antagonist to the riders.
  • Single Woman Seeks Good Man: She tells Astrid that she prefers smart and soft Vikings such as Fishlegs to the tough ones such as Snotlout.
  • Sixth Ranger: She temporarily joined the riders for a few weeks.
  • Strong Girl, Smart Guy: With Fishlegs. He's a dragon expert while's she a skilled Action Girl.
  • Tastes Like Friendship: Stormfly is particularly friendly when Heather feeds her chicken. Astrid is not amused. Gets a Call-Back in season three. Astrid is amused this time, smiling while saying it brought back memories.
  • Token Evil Teammate: Downplayed. While not outright villainous, Heather is prone to act on Anti-Hero traits when the rest of the riders prefer more honorable means (or are too stupid to fit the trope like in the case of Snotlout and the Twins). The first time she ever encountered the riders, she expertly manipulated the riders using flattery and faux-naivety and she even taunted Astrid when she was the only one who saw through the act. Justified in that Alvin threatened to kill her adopted parents if she did not retrieve the book of dragons for her and she refused to risk their lives to trust people she did not even know. In Race to the Edge, she adopted a hood and spiked armor not unlike that of a rogue or assassin, sworn to kill Dagur after he destroyed her village with her adopted family along with it. She pretended to let go of this vendetta until they manage to corner Dagur before revealing that she plans on killing him until Hiccup comes at the last moment before revealing to her that she is Dagur's sister. She leaves to ponder this, and when she meets them again, she pretends to side with Dagur and the Dragon hunters against the Riders only to be acting as double agent, Astrid seeing through her ruse like before. Despite still holding a grudge against Dagur, she seems to abandon these Anti-Hero traits when she joins the riders full-time and eventually learns to forgive Dagur.
  • Took a Level in Badass: In Race to the Edge she is not only a dragon rider with a very powerful dragon, but she can match Astrid in both axe throwing and melee combat.
  • Took a Level in Kindness: Heather is somewhat spiteful and prone to holding grudges against people, like her brother. Nevertheless, she was able to overcome it in the end.
  • Tragic Keepsake: The horn she is seen with in Race to the Edge belonged to her biological parents. Specifically, it was given to her by her birth father, Oswald the Agreeable.
  • Yank the Dog's Chain: When she's last seen in Riders of Berk, she's off to a better life and finally reunited with her parents. Then comes Race to the Edge where we learn that some time later Dagur came along and killed her parents anyway along with most of her village, turning her into a vengeance-obsessed raider.

    Oswald the Agreeable 
The previous leader of The Berserkers, and Dagur's father. In the past, he made a peace treaty with Berk that had been upheld for over fifty years. While liked by Berk, his power was respected and Berk takes steps to make it clear that they were not doing anything to threaten them. However, before the latest treaty signing, it is implied Oswald died of unspecified circumstances, and either way his son Dagur took command of the tribe.
  • Disappeared Dad: Everyone agreed that Dagur killed him, but then Dagur reveals that that isn't true. Oswald had actually disappeared, and Dagur doesn't know what happened to him. As of Season 6, he and Heather are searching for him.
  • Heel–Face Turn: In the comics, Valka reveals that he used to be known as Oswald the Antagonistic, and made at least one attempt at invading Berk. Evidently, Oswald had a change of heart at some point.
  • Names to Trust Immediately: What's not to like about a guy whose epitaph is 'the Agreeable'?
  • Posthumous Character: Implied in "Twinsanity" and then confirmed in "The Night and The Fury", with Dagur discussing how he and Hiccup both had 'fathers who had to be disposed of so they could rule'. Subverted in "Family On the Edge", when Dagur admitted that he hadn't killed his father, and that he does not know where he is. Double subverted, as Dagur and Hiccup find his remains on Vanaheim, having apparently passed away after he had been shipwrecked there for a very long time.
  • Reasonable Authority Figure: Stoick thought he was a great leader and got extremely ticked off anytime Dagur insulted him.


Voiced by: Brook Chalmers
A Berserker who acts as Dagur's second-in-command during Riders of Berk and Race to the Edge.
  • Co-Dragons: Seems to share the role with Savage after Dagur seeminglly killed Alvin and took over the Outcast Tribe.
  • Chuck Cunningham Syndrome: The last anyone's seen of him is Season 2 of Race to the Edge.

Voiced by: Jeff Bennett
A Berserker and fisherman who bullies Dagur.

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