Astrid Hofferson (Hazel and Astrid)

Astrid Hofferson-Haddock is one of the two protagonists of How Hazel and Astrid Train Dragons.

At five years old, Astrid's uncle was killed by the Flightmare and she was slowly slipping away from Hazel. However, at ten years old, Astrid and Hazel began relationships as adoptive sisters after her parents' death and became friends again.

Trivia

 * Instead of getting jealous of Hazel, Astrid got angry that her sister was keeping a secret from her.