Stormfly is Astrid Hofferson's Deadly Nadder.
Riders of BerkEditIn the TV series, Astrid still has Stormfly. Stormfly is the most beautiful dragon in the Dragon Training Academy. Astrid wakes up every morning and Stormfly is the first thing she sees. In the preview episode of the show, Astrid is heartbroken at the thought of having Stormfly taken away, saying that she was used to having the dragon around. It should also be noted that Astrid is very excited in getting her dragon back when Hiccup announces that they can keep their dragons. In episode 3-"Animal House ", where dragons were revealed to have protective instincts, Stormfly is seen protecting sheep with her wings gently and in a comforting way at the end of the episode. Stormfly also appears to be rather intelligent, caring and protective of Astrid. The pair seem to have a strong bond, though not quite as strong as the bond between Hiccup and Toothless . In episode 7, 9 & 11, it was revealed that Stormfly will shoot her tail spines if someone touches her on her blind spot, when she is ill, or when she is startled while sleeping.In episode 10-"Heather Report Part 1", it is shown that Stormfly is beginning to rival Toothless in speed, as Astrid was experimenting with her diet, and apparently, it was working (though Toothless may also not be as fast as he once was due to the weight of his prosthetic tail fin). Later in the same episode, it was revealed that Stormfly was able to fly faster because Astrid gives her a basketful of chicken everyday, rather than fish. She was also ridden by Heather, in episodes 10 & 11, although Hiccup noted that Heather was not capable of riding Stormfly at the same speed as Astrid could push her at. Astrid still continues to give her chicken, as it was shown in episode 13-"When Lightning Strikes". This indicates that chicken gives more stamina to a dragon, and it increases a dragon's speed, or maybe this indicates that dragons are faster and have more stamina when fed their natural diet. She is also the second-best flier in the Dragon Academy, second to Toothless.
- Stormfly and Astrid must have some type of sync as Astrid could do handsprings and cartwheels while Stormfly flew in the air during the Thawfest Games.
- Stormfly's spines are a running gag in the show, as she uses them more than her fire.
- When someone touch's Stormfly's nose she will shoot spikes.
- Stormfly seems to be the easiest of all the dragons to befriend- Heather befriended her in about two minutes by feeding her chicken.