After discovering the location of the King of Dragons on Berserker Island, Tuffnut believes that his uncle Fenris is underneath the island. He then recites a poem he used to adress Fenris when he was a child. Astrid then cuts Tuffnut off, telling him that Fenris has nothing to do with their situation. Later, when Hiccup gets out of the cave, bringing the King of Dragons' egg, Tuffnut asks if Fenris helped him, remarking how the egg has his uncle's fingerprints on it. Hiccup simply replies "Sure, why not?", implying that he liked Tuffnut's story.
According to the rhyme that the twins recite, Fenris Thorston is tall and has light coloured hair (presumably blond) which may or may not be braided.
|Race to the Edge, Season 6|
|1. "In Plain Sight":||Absent||8. "Triple Cross":||Absent|
|2. "No Bark, All Bite":||Absent||9. "Family Matters":||Absent|
|3. "Chain of Command":||Absent||10. "Darkest Night":||Absent|
|4. "Loyal Order of Ingerman":||Absent||11. "Guardians of Vanaheim":||Absent|
|5. "A Gruff Separation":||Absent||12. "King of Dragons, Part 1":||Absent|
|6. "Mi Amore Wing":||Absent||13. "King of Dragons, Part 2":||Mentioned|
|7. "Ruff Transition":||Absent|
- Fenris, or Fenrir, is a giant wolf in the Norse Mythology, one of Loki's offsprings.
- It is still unknown whether or not Fenris ever really existed, as Astrid believed that the twins always “made up” family members.