They might think it's a strange and fascinating alternate view of the world they know. They could be amused by how fans re - imagine the events and characters from HTTYD 1. Maybe they would be a bit jealous if the fanfiction makes the heroes seem even more heroic than in the original movie.
The RTTE villains would likely have a variety of reactions. Some might be intrigued by the creativity of the fanfiction writers. They could also be critical if the story doesn't match up with their understanding of the dragon world. For example, if the fanfiction has dragons behaving in ways that seem out of character according to their experience, they might scoff at it. On the other hand, they might get some new ideas for their own devious plans from the fanfiction.
They might get angry if the fanfiction shows the heroes in a very positive light and the villains as weak or stupid. They have their pride and don't like to be made fun of or belittled, even in fan - made stories.
The characters might find it interesting to see different scenarios that the fans create for them. Maybe there are fanfictions that put them in completely different worlds or situations, like facing a new kind of dragon that doesn't exist in their own world. This could make them think about how they would actually react in such strange circumstances.
They might be amused. They could find some fanfictions that depict them in ways they never thought of, which might make them chuckle at the creativity of the fans.
Well, Cinder would probably be a bit annoyed if the fanfic doesn't portray her as powerful as she thinks she is. She has a huge ego and seeing herself as weak or less important in a fan - created story could really irk her. On the other hand, if the fanfic shows her in a really cool and dominant way, she might secretly enjoy it.
Others might be amused. Fanfictions can have creative and funny interpretations. The characters could enjoy seeing how fans' imaginations run wild, like when a dragon is given some extraordinary new abilities in the fanfiction that are completely different from the movie.
Maybe it's because we have a special interest in the HTTYD universe and want to explore different storylines within it.
They might be quite surprised. Some characters could find it strange to see their own stories being reimagined in different ways by fans. For example, if Sherlock Holmes were to watch elementary fanfiction, he might be intrigued by the new interpretations of his deductive reasoning skills or his relationships with other characters like Watson.
The characters might also feel a sense of flattery. If they see that the fanfiction writers are so passionate about their world and go to great lengths to create these stories. Kristoff, for instance, might be happy that fans are interested enough in his character to include him in different adventures in the fanfiction, even if those adventures are a bit far - fetched from his real - life (in - the - movie - life) experiences.
He might be really surprised. He could find it strange to see different versions of his own story and the people around him in the fanfiction.
Ruby could find the fanfiction inspiring for her own battles and teamwork ideas. Weiss might note any differences in the magic system or how the kingdoms are portrayed. Blake may analyze the themes of love and family in the fanfiction. Yang would enjoy the action - packed parts and might even get some new ideas for her own fighting moves. Overall, they would all have different perspectives based on their own personalities and experiences.