Heather

Heather is a character in the How to Train Your Dragon television series, Dragons: Riders of Berk. She is known to be an antagonist to Astrid because Hiccup begins to put too much trust in her putting a bit of a strain on Hiccup's relationship with Astrid. It is also known that she has been working with the Outcasts when seen with Savage. Astrid finally manages to convince the others that Heather's in league with the Outcasts when she steals Astrid's dragon and the Book of Dragons. It is later shown in Heather Report Part II that the reason why she lied to them was because the Outcasts were holding her parents hostage and would only return them alive if she got information on training dragons.

In the TV series
In the beginning of the episode, Hiccup (with Toothless) and Astrid (with Stormfly) are shown to have recorded their speed in the dragon academy. Snotlout (with Hookfang) lets them to the beach where they meet a mysterious girl named Heather. She wakes up to them staring at her. As she explains her story, they welcome her to Berk as the boys of the group begin to pay more attention to her than to Astrid, making her jealous. Her jealousy and suspicion grows as Heather is seen trying to steal the Book of Dragons and talking with the Outcasts. The next morning she steals the book and hijacks Stormfly. Astrid manages to get Stormfly back. Unfortunately, the Book of Dragons is now in Alvin's hands.

In the next episode, Heather is locked up in Berk while Astrid poses as her to retrieve the Book of Dragons with Hiccup and the others as backup. Heather manages to escape and takes Stormfly again, but this time to help the teens. Astrid manages to retrieve the book and rescue Heather's parents. When Heather finally gets to Outcast Island, she helps the teens fight back. After getting the Book of Dragons and heading back to Berk, Heather and Astrid have finally become friends, as she thanks her for saving her family. Heather leaves Berk with her parents.

It is that in Dragons: Defenders of berk she will have her own dragon named Spout.

Trivia

 * Heather is the only girl teen without blonde hair and blue eyes. She is also the only one that doesn't wear a sleeveless shirt.
 * Due to large amount of patches on her clothes, it is possible Heather comes from a poor island.
 * Heather is shown to have capabilities for dragon training, as all the dragons have taken a liking to her.
 * Heather appears to wear eye liner.