They could also be confused. If the fanfiction takes a really wild turn from the original story, characters might not understand the new concepts or relationships presented. For example, if a fanfiction pairs two characters who have no interaction in the original in a romantic way, it could be bewildering for them.
Some characters may be flattered. Seeing how fans are so interested in their world and come up with their own stories can make them feel like they are important and well - loved. They might appreciate the effort that fans put into creating these fanfictions, even if they don't always agree with the content.
Well, some characters might be amused. They could find the creative interpretations in the fanfiction quite interesting and might even laugh at the funny or unexpected scenarios. For example, Toothless from HTTYD might be curious about how he is portrayed in the fanfictions.
Fishlegs would likely have a very animated reaction. If he comes across some fanfiction that has really strange dragon facts, he'd be so shocked. He might start rambling on about how wrong it is according to his extensive dragon knowledge. His eyes would be wide and he'd be waving his hands around.
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.
They could also be offended. If the fanfiction portrays them in a way that goes against their values or character traits in the original work, they may feel misrepresented. For example, if a character is always shown as noble in the original but is made into a villain in the fanfiction. They might not like this change at all and feel insulted.
They might be amused. Since fanfiction often contains creative and sometimes humorous takes on the original story, characters could find it funny to see how fans imagine different scenarios for them.
They may also be confused. Fanfictions often take the original story in new directions, and characters might not understand why certain things are written the way they are. For example, if a fanfiction changes the relationship dynamics between characters, they could be left scratching their heads.
They might be amused. Some characters could find the creative interpretations in the fanfiction quite interesting and it might make them laugh or at least bring a smile to their faces.
Well, some characters might be a bit critical. For example, if the fanfiction takes their personalities in a very different direction than what they are in the original Mob Psycho 100. They could be like, 'That's not really how I would act!' But on the other hand, some might be flattered by the attention and the new storylines created around them. It also depends on the nature of the fanfiction. If it's a heart - warming story, they might enjoy it more than a really dark and twisted version of their story.
Others might be critical. For example, if the fanfiction goes against the established canon of the Danny Phantom universe, they could be annoyed or feel that it misrepresents them. They might think that the author didn't do enough research on their personalities or the story's lore.
They might be shocked. Since fanfiction can often deviate from the original plot, characters could be taken aback by unexpected storylines or characterizations.