Well, some characters might be flattered by the fanfiction. For example, the main character in Solo Leveling could be amused to see different interpretations of his adventures. He might think it's cool that fans are so creative with his story.
The older characters such as Kakashi would be cautious. They would recognize Naruto but also be worried about the implications of someone from the future being in the present. They would want to know if his presence could change the future in a negative way. For example, they might fear that his actions could lead to the earlier awakening of a powerful enemy. As for the villains, they might see future Naruto as a threat and try to eliminate him as soon as possible. Orochimaru, for instance, would be very interested in Naruto's future powers and might try to capture him to study. And the new generation of ninja in the past would look up to future Naruto, seeing him as a symbol of what they could become.
Sure is! Solo Leveling is a well-known manhwa that has captured the attention of many readers. It features exciting action and interesting character development.
It's hard to say which one is more popular as it depends on different factors. In some regions, the manga might be more popular because it appeals to those who like visual stories. The action - packed panels and the cool character designs can draw in a large audience. For example, in Japan, the manga format is very popular in general, so the solo leveling manga has a good chance of being well - received there.
The main difference is in the way the story is presented. The manga has visual art that can enhance the action scenes and character designs. For example, the epic battles in the manga can look really cool with detailed drawings. The light novel, on the other hand, usually goes more in - depth with the descriptions of the world - building and the characters' inner thoughts. It might have more detailed explanations of how the leveling system works in the story.