The Bnha universe's reaction would be mixed. Those who are into complex stories, like Todoroki, might study the relationships in Hamilton fanfiction. But others, like Mineta, might not be interested at all because it doesn't have much to do with his usual interests. Overall, it would depend on the individual characters' personalities and interests.
Some would be inspired. Characters like All Might might see Peter Parker's journey as similar to his own in some ways. Both are trying to do good in a world full of challenges. All Might could appreciate Peter's determination to protect his city despite having a normal life outside of being a hero.
For heroic - centric fanfictions, they would likely be disdainful. Since they oppose heroes, seeing stories that glorify heroes would annoy them. They might scoff at the idealized versions of heroes in those fanfictions.
Some characters might be amused. They could find the different interpretations in the fanfiction entertaining and might even share it with other characters.
Darth Vader would probably have a complex reaction. He might feel a sense of familiarity that he tries to suppress. His first instinct could be to destroy R2D2 as it represents a part of his old self that he has tried to forget. But at the same time, he might be intrigued by what the droid could tell him about his past or the Rebellion.
The crew's reaction would depend on the situation. If they meet Dragon in a dangerous situation, they would be relieved to have such a powerful ally. If it's a more casual meeting, they would be eager to learn more about him. Luffy would be overjoyed, and his happiness would be contagious. The rest of the crew would gradually warm up to Dragon, and they might start sharing their own stories and dreams with him, forging a new connection within the One Piece universe.
Some of their more responsible friends might be initially shocked but then offer support. For example, they could help with getting supplies or covering for them when they need to rest.
Some characters might be excited. They could be interested in seeing how their story continues in the fanfiction. Others might be skeptical and think that the fanfiction is not a true representation of their possible futures.
2D, 3D, 4D, and 5D were common terms in film technology. They were different in terms of visual effects and viewing experience.
A 2D movie was a traditional 2D movie. The audience could only see the image on a flat screen without any three-dimensional effect.
3D movies were made using the perspective difference and convergence function of the human eye. After the audience wore special glasses, they could see the image from the left and right perspectives, creating a three-dimensional effect.
A 4D movie was based on a 3D cinema with various special effects and dynamic seats around the audience. When the audience watched a 4D movie, they could get a comprehensive sense of sight, hearing, touch, smell, and so on. For example, special effects such as seat vibration, wind blowing, water spraying, smoke, and so on.
5D movies added more environmental special effects and stimulating effects on the basis of 4D motion movies, allowing the audience to achieve an immersive effect from five aspects: hearing, sight, smell, touch, and motion.
In summary, 2D movies were flat, 3D movies had a three-dimensional feel, 4D movies added special effects and dynamic seats on the basis of 3D, and 5D movies added more environmental special effects and stimulating effects on the basis of 4D.
Some characters in bnha scary stories are unique to those stories. These new characters are often created to add to the spooky or suspenseful atmosphere. They might have really strange or terrifying quirks that we don't see in the main series. For instance, a character with a quirk that allows them to manipulate shadows into terrifying shapes that can attack people. So, in many ways, they are different from the characters in the main series.