Well, when Hiccup is a dragon in fanfiction, it could be because of an ancestral connection or a mysterious experiment. This could open up new storylines and allow for exploration of his identity in a completely different way. Maybe it's a way to show his ultimate empathy and unity with the dragon species.
One popular theme is the further adventures of Hiccup and Toothless. Writers often explore new lands and challenges that they might face. For example, they might encounter a new type of dragon with unique abilities.
In such fanfiction, Hiccup being half dragon often leads to unique adventures and challenges. His mixed heritage might give him special powers or put him in conflict with both human and dragon societies.
The dragon rider tribe in fanfiction often explores unique traits and powers of the riders and their dragons. It could involve special bonds and adventures.
Hiccup would likely approach it with enthusiasm. Since he loves his dragons and his adventures, he would be eager to see how others imagine the world of 'How to Train Your Dragon'. He might find some fanfictions that give him new perspectives on his own life and relationships. Toothless, being a dragon, might not understand all the words but would react to the emotions in the stories. If the fanfiction shows a happy moment between him and Hiccup, he might get excited and start making his little happy dragon noises. Astrid would probably analyze the fanfiction carefully. She would look for any inaccuracies in how her character is portrayed, especially when it comes to her skills as a dragon rider and her relationship with Hiccup.
The fanfic 'Runt' in the 'How Train Your Dragon' universe might have unique character developments and new storylines. Maybe it focuses on a less prominent dragon or explores a different aspect of the world.
Well, Hiccup would probably be quite interested. He is always open - minded. He might find some of the creative ideas in the fanfiction inspiring. He could see new ways his relationship with Toothless or his role as a leader could be developed. Astrid, on the other hand, might be a bit more critical at first, but then also get into it if the fanfiction has a good story line. She would be looking for how accurately her character's strong - willed nature is represented.
Fanfiction.net is also a good option. There are many authors who post their HTTYD and HTTYD 2 fanfictions there. However, the quality may vary, so you might need to spend some time looking through different stories to find ones you like.
One possible reaction in a fanfiction could be about the new dragon species introduced. A character might be in awe, thinking 'These dragons are so unique! Their colors and abilities are like nothing I've ever seen in Berk.'