They could have a range of reactions. Naruto would likely be excited and eager to see new stories about his world. He loves adventures and would be interested in seeing different takes on his life.
Sakura might be a bit surprised at first. She has always seen Naruto as a friend, but she would quickly come to support him. She knows how much Naruto values his relationships, and if he has found love with Gaara, she would be happy for him. Kakashi would be very accepting. He has always believed in Naruto's judgment and would see this as another step in Naruto's journey to change the ninja world. Shikamaru would probably be the one to think about all the political implications but in the end, he would also support it as he trusts Naruto.
Naruto would likely be excited. He loves his son so much that seeing different stories about Boruto would be like seeing different potential futures for him. He might even get some inspiration from the fanfiction to give Boruto some advice in real life.
Naruto would likely be very curious and excited. He'd probably try to befriend everyone, whether they were humans, demi - humans or monsters. His positive attitude would be a shock to some of the more cynical characters in the Overlord world. Sasuke, on the other hand, would be more guarded. He'd assess the situation and look for ways to gain power. He might see the powerful magic and different races as a means to achieve his own goals.
Sasuke would likely be very suspicious. He has always had a complex relationship with Naruto, and this new, twisted Naruto would be a huge red flag for him. He might initially think it's a trick or some new form of power Naruto is trying to master, but as he realizes it's a real change, he would be on guard. Sakura would be worried and try to find a way to bring Naruto back to his old self. She has always cared about Naruto and would not be able to stand seeing him like this.
The gods in the Percy Jackson universe would have mixed reactions. Some might see the daughter as a potential threat or a powerful ally. Zeus might be initially suspicious, but if the daughter proves her worth, he could be an important figure in her story. Poseidon would be proud, as he was of Percy. In the Naruto world, the village elders would be cautious. They would want to make sure the daughter uses her powers for the good of the village. But characters like Iruka would be very supportive from the start, seeing the potential for great things in the daughter.
Sasuke would likely be conflicted. On one hand, he and Naruto have a deep bond, but on the other, Sasuke has his own ideas about justice. He might try to stop Naruto at first, reasoning with him. If that fails, he could be forced to choose a side, either to support Naruto's cause if he believes there's some merit to it, or oppose him to protect the shinobi world as he knows it.
Well, Sasuke would be furious. Naruto was his rival and also his friend. He would seek vengeance on the mob without a second thought. Shikamaru, on the other hand, would be more calculating. He would try to figure out how such a thing could happen and what the long - term consequences for the village would be.
Naruto would be excited and ready to face whatever comes. He's always been positive and believing in his ability to change things. So, he'd see it as a challenge to make the future better.
Sakura would be shocked and immediately try to protect the villagers. She might use her medical ninjutsu to heal any injured villagers and then try to subdue Naruto. She would probably be very vocal about how Naruto's actions are wrong and try to bring him back to his senses.