Fishlegs and Heather's Relationship

Fishlegs and Heather's relationship throughout most of Season 4 of Race to the Edge would best be termed as not always platonic best friends.

Season 3
Fishlegs and Heather became official in To Heather or Not to Heather when Heather joined the riders to live with them on the Edge for a few weeks. Their relationship mainly stayed in the background for the majority of the episodes.

Season 4
Their relationship was touched more upon in season 4 and we saw an almost kiss followed by an official kiss in Gold Rush. Even though Heather soon left Dragon's Edge to join her brother on Berserker Island, she and Fishlegs continued to hold a torch for each other.

Season 5
Heather and Fishlegs were confirmed to still be dating in season 5, although it was never really shown on screen.

Season 6
By the end of the final season, Heather and Fishlegs had seemingly drifted apart due to long distance. They appeared to still be on friendly terms however.

Behind the Scenes

 * According to the writers, Heather and Fishlegs were planned to be together since the first season of Race to the Edge. Heather was always meant to be a love interest for Fishlegs.
 * Heather and Fishlegs are also dating in the game Rise of Berk, according to the Valentine's Day promo in 2017.
 * Heathlegs are still an item in Season 5 according to a promo picture posted by DreamWorks on the How to Train Your Dragon's official Facebook page.