The Dragon Riders' Auxiliary, also known as the A-team, are group of dragon riders founded by Astrid Hofferson, and that acts as a back-up force on the Isle of Berk. It first appeared in the second season of Dragons: Race to the Edge.
In "Team Astrid", following Dagur's attack on Berk, Stoick approved of Astrid Hofferson's idea to train a group of back up riders to defend Berk. Astrid then trained her trainees hard at the Dragon Academy. The auxiliary then assisted Astrid, Stoick, Hiccup and his riders in defending Dragon's Edge. They were able to drive Dagur's fleet away from the edge. Astrid then assigned Gustav to lead the Auxiliary in her absence.
|Gustav Larson - Captain of the Rider's Auxiliary||Fanghook|
|Silent Sven||Sven's Nightmare|
|Bucket & Mulch||Whip & Lash|
- Every member of the Auxiliary riders has a dragon that matches the main dragon riders except Gustav, while being the leader, has a Monstrous Nightmare rather than a Night Fury (due to Toothless being the only known individual at the time).
- 3 of the 5 Auxiliary riders have names for their dragons: Fanghook, Kingstail, and Whip & Lash. The other two are Sven's Monstrous Nightmare and Gothi's Gronckle. Ironically, Sven broke his silence in "Cast Out, Part 2", so he should have been able to name his dragon.
- In School of Dragons, during the expansion "Secret of the Leviathan", Phlegma is part of the A-team. It is possible that she joined the group after the events in Race to the Edge and perhaps even How to Train Your Dragon 2.