Talk:Heather/@comment-39534844-20190520211703/@comment-37262501-20190521020057

They are not siblings, and all the info is in “Have Dragon Will Travel, Part 1” and “Have Dragon Will Travel, Part 2”. There’s a couple flashbacks in which we see in one of the flashbacks what is obviously Stoick’s hand handing Heather a horn with the Berkian Crest on it. They later say that it was a gift from one chief to a chiefs newborn daughter. The episodes just tease you with the idea that Hiccup might have siblings but Heather is the daughter of Oswald the Agreeable and brother of Dagur while Hicuup is the son of Stoick and Valka Haddock. So to answer your question, Kiaraaaak, Hiccup Haddock and Heather are not sibling. I guess you could say that they are in fact.... “or what” :)