In How to Train Your Dragon, what type of dragon is Astrid’s companion Stormfly?

Stormfly is a Deadly Nadder in the How to Train Your Dragon franchise.

Stormfly belongs to the Sharp class of dragons and is recognizable by her blue coloring, powerful wings, and the large spines covering her body. Astrid Hofferson becomes her rider after the young Vikings begin learning that dragons can be trained rather than treated only as enemies.

The Deadly Nadder’s signature attack involves launching sharp spines from its tail. Stormfly’s personality is often portrayed as proud, energetic, and fiercely loyal, traits that complement Astrid’s determined character. She also becomes one of the best-known dragons in the wider franchise.

Viewers sometimes confuse Stormfly’s species with the Monstrous Nightmare, the species associated with Hookfang, or the Gronckle, the species associated with Fishlegs’s dragon Meatlug. Those are separate dragon species with different designs and abilities.