One common theme could be friendship. Oto and Maho might be portrayed as having a deep and meaningful friendship that overcomes various obstacles. Another theme could be adventure, where they go on exciting journeys together.
I'm not sure of specific oto x maho fanfiction stories off the top of my head. You could try searching on fanfiction websites like Archive of Our Own. They usually have a wide range of fanfictions, and you might find some interesting oto x maho ones there.
One of the potential allies could be Jiraiya. Even though he has his own ties to Konoha, he might see Naruto's leadership in Oto as a way to bring about a new balance in the ninja world. Also, some of the more open - minded members of Oto itself could become Naruto's allies. They might be impressed by Naruto's leadership skills and his vision for the organization, which could be different from what Orochimaru had in mind.
Another idea is to create a story where Naruto discovers an ancient oto-related secret that has been hidden for generations. This could involve him going on a quest, meeting new characters who are also interested in the oto, and having to protect the secret from those who would misuse it.
Naruto would face the challenge of resources. Orochimaru had his own ways of obtaining resources, some of which were unethical. Naruto would need to find legitimate ways to sustain Oto, whether it's through trade, alliances, or new forms of income generation. He also has to deal with potential threats from other ninja villages. They might see Naruto's leadership of Oto as a threat or an unknown variable and could take preemptive actions against Oto.
Think about the emotions you want to convey. If your naruto oto fanfiction is about Naruto finding a long - lost oto - related friend, you might want to focus on emotions like joy, nostalgia, and loyalty. Start writing from the heart, don't worry too much about making it perfect at first. Just get your ideas down on paper (or on the screen) and then you can go back and refine it later.
One possible plot could be that the Kage of Oto has a secret alliance with Naruto. They work together to uncover a hidden threat to the ninja world that neither of their villages could face alone. This would involve a lot of intrigue, as they have to keep their alliance a secret from others who might not trust the Kage of Oto.
The main antagonists could be a group of rogue ninjas from other villages who don't want to see the Kage of Oto and Naruto form an alliance. They fear that this new partnership could disrupt the power balance in the ninja world and are willing to do anything to stop it, including assassinations and sabotage.
One great 'oto Naruto fanfic' is 'The Legacy of the Uzumaki'. It focuses on Naruto's journey to discover more about his Uzumaki heritage. The story has well - developed characters and exciting plot twists.