If that fails, Naruto would be a fierce fighter for the Leaf. But he would also be conflicted because he has friends in the Sand, like Gaara. He would fight to protect his village and its people, but at the same time, he would try not to cause too much harm to the Sand shinobi. He might even try to single - handedly stop the fighting on the battlefield by appealing to the emotions and bonds between the two villages.
Naruto's reaction would also depend on the cause of the war. If he discovers that the Leaf is in the wrong, he might try to make his own village see reason. He could be a voice of peace within the Leaf, trying to convince the elders and other leaders to end the hostilities. On the other hand, if the Sand is the aggressor without just cause, he would fight bravely, but still with the hope of ending the war as quickly as possible and restoring the relationship between the two villages.
Naruto would probably first try to find a peaceful solution. He has always been one to believe in the power of friendship and understanding. He might try to talk to the leaders of both villages, like Gaara in the Sand, to find out what's really going on and resolve the misunderstandings.
Sasuke might be conflicted. He has his own complex relationship with Naruto. Part of him might understand Naruto's reasons for leaving, but he could also be angry that Naruto didn't confide in him. Sakura would be worried sick. She has always cared about Naruto, and his leaving would leave a big hole in the team. Kakashi, on the other hand, would be disappointed but also respect Naruto's decision if he thought it was for a noble cause.
One possible reason could be a misunderstanding over a shared resource. For example, if there's a new chakra - rich area discovered on the border between the two villages, both might claim it as their own, leading to conflict. Another reason could be due to the actions of a rogue ninja who frames one village against the other. Maybe a Leaf ninja is made to look like they attacked Sand shinobi, sparking anger and calls for war.
Well, in this fanfiction, perhaps the 'agents mist' are actually a secret group within the Mist Village that has been causing trouble. So, the Leaf decides to go to war to stop them. The story could involve Naruto learning about the motives of these agents and trying to find a diplomatic solution while also being prepared for combat. There might be some betrayals and unexpected alliances along the way. For example, some members of the Mist Village might side with the Leaf against the agents. And Naruto's friends from the Leaf, like Sasuke and Sakura, would play important roles in the battles and the diplomatic efforts.
In a more welcoming village, the villagers could be excited to have him. They might see him as a hero because of his reputation in the ninja world. They would ask him for stories about his battles and adventures, and Naruto would be happy to share, creating a friendly and positive atmosphere.
Choji would be sad and also a bit scared. He has always been a loyal friend to Naruto. He might not be as aggressive in trying to stop Naruto as some of the others, but he would try to reason with him, talking about their friendship and how the village has also been a home to Naruto. And Ino would use her mind - related jutsu to try to break any possible mental influence on Naruto if there is one, while also trying to reach out to him emotionally.
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.
Obviously, Naruto would be one of the main characters as he is from the Leaf Village and would likely lead the charge against the agents of Mist. Sasuke could also be there, as he often teams up with Naruto in important battles. Sakura might be involved too, using her medical and combat skills. And from the Mist side, there could be some important ninja agents who are the antagonists, though their identities would be developed as the story progresses.
The Leaf Village would be in chaos at first. Hinata is an important member of the Hyuga clan, and her kidnapping would not be taken lightly. The Hokage would immediately call for an emergency meeting. They would start by sending out search teams, likely led by some of their best shinobi like Kakashi or Shikamaru, who are known for their intelligence and combat skills.
Sakura from Leaf could be a key character. Her medical skills would be in high demand on the battlefield to save the wounded. Temari from Suna, being a strong kunoichi, would be important in leading Suna's forces. Also, Shikamaru from Leaf, with his strategic mind, could be the one devising plans for Leaf's military operations against Suna.
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.