Defenders of the Hidden World

"This will be the start of a new organisation: Defenders of the Hidden World. Our job will be to protect the Annex and protect dragons everywhere. Once the students of the School of Dragons learn enough about dragons to be able to defend them, they'll join us."

- Astrid Hofferson

Defenders of the Hidden World is an organisation founded by Astrid Hofferson, which first appeared in the game School of Dragons.

History
After the Dragon Riders defeated Grimmel the Grisly at New Berk, Astrid decided to form new organisation called Defenders of the Hidden World. Its purpose is to protect the Hidden World Annex that has opened on School of Dragons from those who may want to hunt dragons inside it. Astrid states that every trainercwho is able to fight for dragons can join the organisation.

Trivia

 * It is highly probably that the original Dragon Riders are part of this organisation.