Some anime characters could be confused. Consider a more serious and by - the - books character like Levi from 'Attack on Titan'. Fanfiction often takes creative liberties and goes against the established canon, so he might be really confused by the strange plotlines and character interpretations he reads in fanfiction.
There could also be characters who are flattered. Take a character like Edward Elric from 'Fullmetal Alchemist'. If he reads fanfiction where the author clearly admires him and writes him in a positive light, he might feel a bit flattered, although he might also be a bit embarrassed at the same time.
Surprise. They might be surprised to see how fans imagine different scenarios for them. For example, a character from a magical girl anime might be shocked to find a fanfiction where she's suddenly a detective in a noir - style story.
They might be amused. Since Twilight has a very unique world and characters, seeing different interpretations in fanfiction could bring a sense of novelty and humor to them.
In a Goku vs Broly crossover fanfiction, anime characters could have different reactions. Some might see Goku as a symbol of justice and be inspired by his never - give - up attitude. On the other hand, Broly's raw power could intimidate those who value brute strength. And there could also be characters who try to interfere in the fight for their own motives, like to stop the destruction that such a powerful battle could cause.
Some characters would be excited. Imagine if Goku from Dragon Ball saw a fanfic where he had new and even more powerful forms. He'd probably be thrilled to see the creativity of the fans and might even get inspired to train harder in his own world, thinking about all the cool possibilities the fanfic presented.
They might be surprised at how creative the fans are. Some characters could be amused by the different interpretations of their personalities and the events in Endgame. For example, if Iron Man's character reads a fanfiction where he has a different ending in Endgame, he might find it interesting to see how fans envisioned an alternative scenario for him.
He could be a bit jealous. Boruto has his own relationship with Sasuke as his mentor, and if Sarada is so interested in fanfiction about Sasuke, Boruto might feel like she's encroaching on his territory in a way. However, he would probably be too proud to admit it right away.
He might be really surprised. Since he's used to his own real - life adventures, seeing different interpretations in fanfiction - based anime could be quite a shock. For example, if the fanfiction shows a different version of his relationship with Sasuke, he would be taken aback.
Harry Potter might be a bit surprised. He'd probably think it's strange that people are writing about his friends' and his own relationships in such a different way. Hermione would likely be very interested in the writing style and how the authors are creating these new relationships. She might even take notes to improve her own writing. Ron would just laugh it off most of the time. He'd find it a bit odd but also funny.
In the fanfiction, different 'httyd' characters will have different reactions to future events. Hiccup, as a leader, will be vigilant. He'll try to anticipate any problems that might come with the future changes. Astrid will be his support, but also offer her own insights. She may be more focused on the practical aspects like food supplies and shelter in a changing future. The dragons, like Hookfang, may react based on their immediate senses. If they sense danger, they'll be defensive, but if it seems like an opportunity for a good hunt or exploration, they'll be more open.
In the fanfiction, a character might also react with confusion. Sans' attacks and his overall fighting style can be very unique and hard to understand. A character who is used to more straightforward combat might be completely bewildered by Sans' moves, not knowing how to counter or even react properly.