Heather's Dragon Eye Lens

Heather is seen wearing a Dragon Eye lens on her belt throughout the Dragons: Race to the Edge series. It is first brought attention to in the Season 5 episode "Sins of the Past".

History
Heather was given the mysterious lens by her father Oswald the Agreeable when she was a small child. She never knew what it was or what it was for, but she wore it on her belt in memory of her father.

"Sins of the Past"
The Dragon Hunters have possession of the Dragon Eye, and as their new leader, Krogan is determined to get a hold of the lens that Heather wears on her belt. He manages to get her to trade it for her dragon Windshear. Turns out, the Riders had never noticed it on her belt even after so much time they spent together, neither did Heather realize what it was after watching the Riders work with the Dragon Eye and the other lenses during that time. Now everyone is curious about what info it contained, but it's in Krogan and Viggo's hands. It is uncertain how exactly Krogan knew Heather had it to begin with.