Kakashi, being the more experienced and level - headed one, would probably analyze the situation carefully. He would study the details of the future shown in the fanfiction. He might use it as a warning or a guide. He could start making plans in case the future events seemed negative, and also try to figure out if there were any positive opportunities that could be exploited from what he saw.
Some characters might be shocked. For example, Naruto himself. He has always been full of hope for the future and worked hard to build a better world. If he saw a future that was not as positive as he expected, he would be very disappointed at first. But then he would surely try to find a way to change it, because that's his nature.
They might be shocked. For example, Ruby could be amazed by how her skills develop in the future depicted in the fanfiction. She might see herself using new techniques and facing different challenges, which would make her eager to train more to reach that level.
They would probably be shocked. For example, Naruto might be amazed to see how the village develops further. He could be excited to see new generations of ninjas and the peace that his efforts have led to in the future. Sasuke might be more reserved in his reaction, but he would also be interested in seeing if his own actions had a long - term impact on the ninja world.
Sasuke could have a really unexpected reaction. If the fanfiction portrays a future where he and Naruto have a very different relationship than he expected, he could be completely thrown off. He might start to question his own actions and decisions. Also, Tsunade's reaction could be quite a shocker. If the fanfiction has her in a situation where she has to give up her position as Hokage in a way she didn't anticipate, she might get really angry at first but then start to consider the implications for the future of the village.
Some characters might be shocked. For example, if a heroic character sees a fanfiction where they turn evil in the future, they would be very surprised. They might start to question their own actions and whether there are any signs that could lead to such a change.
The Avengers would have a range of reactions. Natasha Romanoff might analyze the characters in the Naruto fanfiction like she does with her targets. She'd look for their strengths and weaknesses. Bruce Banner, when not in Hulk mode, would be interested in the scientific aspects of the Naruto world if they were mentioned in the fanfiction. Clint Barton would probably just be along for the ride, laughing at the more comical parts and enjoying the break from all the superhero stuff.
In Naruto future reaction fanfiction, characters might react to various things. For example, they could react to new jutsu developed in the future. They might be amazed at the power and creativity behind it. Maybe Naruto himself would be excited to see how the next generation has advanced the art of ninjutsu.
The MHA characters' reactions could vary widely. For instance, All Might might see the Naruto fanfiction as a great source of inspiration. He could admire the way the characters in Naruto strive for their goals, just like heroes in their own world. Todoroki might be a bit detached but still interested. He'd analyze how the power systems in Naruto compare to quirks in their world. Mineta would probably be more interested in any fan service - like elements if there were any, but that's not a very positive reaction. Overall, it really depends on each character's personality.
Well, it depends on the characters. Ariel might be intrigued, seeing different interpretations of her story. Prince Eric could be either amused or a bit confused if the fanfiction takes a really wild turn. Ursula might cackle with glee if the fanfiction shows her in a more powerful or devious light than in the original movie.
If we consider the Heathers characters watching the musical fanfiction, they would bring their own personalities to their reactions. For example, Heather Chandler, being the dominant and self - assured character she is, might be enraged if the fanfiction shows her in a weak or submissive light. Heather Duke, who is always vying for power and status, might see the fanfiction as a threat to her image if it doesn't uphold her as a 'worthy' successor to Heather Chandler. And Heather McNamara, the more sensitive of the Heathers, could have a mixed reaction. She might be a bit more open to the creativity of the fanfiction but also worried about how it reflects on her and her friends. Veronica, on the other hand, might be the most open - minded. She has a more complex view of the world around her and could potentially appreciate the different perspectives offered by the fanfiction musical.
Some characters might be shocked. For example, Ichigo might be surprised by the future battles and the development of his friends. He could see new powers emerging and might start to train harder in the present to face the future challenges.