The Vicious Twins are a pair of characters mentioned in How to Train Your Dragon.
|“||The Elders of the Tribes were Mogadon and Stoick, Gobber himself, and a few more of the more fearsome warriors, such as Terrible Tuffnut, the Vicious Twins, and the Hairy Scary Librarian from the Meathead Public Library||”|
|— Book 1|
As Elders, at a Thor'sday Thursday celebration when the Viking Initiates' dragon run amok, they were included in an Elder Huddle to decide their fate. Since the initiates failed to demonstrate control over their dragons, the Elder Huddle decided to exile all of them. During the huddle, the Twins had to break up a fight between Mogadon and Tuffnut:
|“||The Elders consulted for a long time. Mogadon got angry at one point and swung a fist at Tuffnut. A twin held on to each of his arms until he calmed down again.||”|
|— Book 1|
Since the initiates failed to demonstrate control over their dragons, the Elder Huddle decided to exile all of them.
Humongously Hotshot the Hero arrives on Berk and stays on a while as Hiccup's Bardiguard. Due to his celebrity status as a hero, the villagers all change their styles, especially beard fashion. The Vicious Twins adopted styled beards with bows in them and "polished their helmets until they sparkled".
The Vicious Twins are described as "fearsome warriors". They are adult males with dark colored hair and beards. Both of their noses are crooked. It is unclear if they are identical twins or very similar-looking fraternal twins.
|"How to Train Your Dragon":||Background||"How to Ride a Dragon's Storm":||Absent|
|"How to Be a Pirate":||Absent||"How to Break a Dragon's Heart":||Absent|
|"How to Speak Dragonese":||Absent||"How to Steal a Dragon's Sword":||Absent|
|"How to Cheat a Dragon's Curse":||Absent||"How to Seize a Dragon's Jewel":||Absent|
|"How to Twist a Dragon's Tale":||Background||"How to Betray a Dragon's Hero":||Absent|
|"A Hero's Guide to Deadly Dragons":||Absent||"How to Fight a Dragon's Fury":||Absent|