The characters could have mixed feelings. They might appreciate the creativity of the fans in some cases. For instance, if a fanfiction delves deeper into a relationship between two characters in a way that makes sense, they could be happy about it. But if the fanfiction goes against their values or misrepresents them, they would be unhappy. Take the Goblin Slayer, he values his mission above all, if a fanfiction makes it seem like he doesn't, he would be displeased.
Spider - Man, being the youngest of the group, would be really excited. He would love seeing all the different versions of the Avengers' story. He might even get some inspiration from the fanfiction for his own heroic deeds. He could exclaim 'This is so cool! There are so many ways our story can be told!'
Characters might also be a bit critical. They know their world and themselves better than the fanfiction writers. So they could be nitpicking at inaccuracies or things that don't quite fit with their personalities. But at the same time, they may also be impressed by the creativity and passion that goes into creating these fanfictions.
There could be characters who are outraged. If the fanfiction distorts their personality or makes them do things completely against their nature, they may be very angry. For example, a noble character made to act like a coward in the fanfiction would likely not take it well.
Characters may have different reactions. For example, if a character is normally shy in their original story but the fanfiction portrays them as a bold adventurer, they might be initially taken aback. But then they could start to think about that different side of themselves. Or if a character is a villain in the original and the fanfiction gives them a redemption arc, they might feel a sense of hope or confusion about this new view of themselves. They may also get excited to see new plotlines and relationships that fans come up with.
When characters watch reviews, they may experience a range of emotions. A character who is insecure might be deeply affected by negative reviews and might even question their own worth or actions within the story. In the case of fanfiction, they could be in awe of the fans' imagination. They might see new possibilities for their own character development that they hadn't considered before. However, they could also be very protective of their original story and not like some of the liberties taken in the fanfiction.
There could be characters who are skeptical. They might not believe what they read in the fanfiction about their future and dismiss it as just some wild imagination. After all, it's not part of their official story. For example, a very traditional and by - the - book character might not give any credence to the fanfiction's version of the future.
Some characters might be amused. They could laugh at the creative and sometimes silly interpretations of their world in fanfiction.
Well, it could be really interesting. Some characters might be amused by the different interpretations of their world in the fanfiction. They might find some of the ideas creative and enjoy seeing how fans view their relationships and adventures. For example, the Goblin Slayer himself might be surprised at how fans depict his internal thoughts in the fan - made stories.
Characters may have mixed reactions. They might be initially skeptical, but as they read more, they could get drawn into the different story arcs. If the fanfiction delves deep into their backstories in a new and interesting way, they may appreciate it. For example, if a character's past trauma was only hinted at in the show but is fully explored in the fanfiction, it could make them feel more understood. However, if the fanfiction is too far - fetched from what they know of their world, they might be put off.
There are also those characters who might be indifferent. They are so focused on their real tennis battles and their own lives within the Prince of Tennis universe that they don't really pay much attention to fanfiction. Characters like Sanada might think it's just a frivolous thing created by fans and not something that should distract them from their training and their pursuit of victory.