The unexpected ally might be a character from a different village, like Gaara from the Sand Village. Gaara has a deep respect for Naruto and has changed his ways after his encounter with Naruto. In this fanfiction, Gaara could come to the aid of the Hidden Leaf Village because he believes that the safety of all villages is interconnected. His unique sand - based powers would add a different dimension to the fight to save the Hidden Leaf Village.
It could be a rogue ninja from the Hidden Leaf's past who has come back for revenge. Maybe someone who was wronged by the village long ago and has now amassed great power to destroy it. Another possibility is a new enemy from outside the village, like a powerful warlord from a far - off land who wants to conquer the Hidden Leaf for its resources.
One key plot point could be Naruto facing a new and powerful enemy that no one in the village can defeat alone. He might have to master a new jutsu in a very short time. For example, he could discover a secret about his family's past that gives him an edge. Another plot point could be Naruto uniting the different clans in the village. Since they all have different abilities and grudges, Naruto would need to use his charisma and leadership to bring them together to fight the common foe.
An unexpected ally could be an old enemy from his past. Maybe a Hollow that he once fought and defeated now sees a greater threat in the situation after Ichigo's revival and decides to team up with him. For example, the Hollow might have information about the new forces that are emerging since Ichigo's return and offers to share that in exchange for some form of protection or mutual benefit.
In one possibility, Naruto might leave the Leaf due to a misunderstanding. For example, if the villagers continue to show distrust towards him despite his efforts. He could set out on a journey to find a place where he truly belongs. Maybe he meets some new allies on his way, people who understand him without any prejudice.
It could be a rogue ninja from another village who wants to use the demon within Naruto for his own evil purposes. He might be power - hungry and sees Naruto as a tool to gain control over the Hidden Leaf and other ninja villages.
The Hidden Leaf Village would be in deep mourning. Naruto is a hero to them, and his loss would be felt throughout the village. The villagers would feel a great sense of insecurity as Naruto was one of their main protectors. The morale of the ninja in the village would be low, but it could also lead to a new generation being inspired to become stronger in Naruto's memory.
The most obvious change would be in the village's security. Naruto, as a ruler, would no doubt strengthen the village's defenses. He could form new alliances with other ninja villages, creating a united front against any potential threats. In terms of internal affairs, he might create more opportunities for the lower - class ninjas. Instead of only the powerful clans getting all the good missions, he could ensure a more equal distribution of tasks, which would improve the overall morale of the ninja population.
The village might experience a huge boost in morale. Naruto killing Pain would be seen as a major victory, and the villagers would feel safer. They would look at Naruto as an even greater hero, which could lead to more trust and unity within the village.
It might be a village that focuses on equality among all ninja clans. In Naruto's created village, there could be no discrimination based on bloodline limits. Instead, every ninja, regardless of their family background, would be given equal opportunities to learn advanced jutsu and rise in the ranks. This would attract many ninjas from other villages who are tired of the traditional clan - based hierarchies.
A little mouse in the maze could be her unexpected ally. It might know all the secret passages and hidden corners of the maze and could lead her to safety or important clues.