Well, in such a fanfiction, Naruto might be very protective of his little brother. He could introduce his brother to all his friends, like Sakura and Sasuke. His brother might struggle with the same kind of loneliness Naruto once felt, but Naruto would be there to support him, ensuring he doesn't go through the same hardships he did. And they could train together to become strong ninjas.
In this fanfiction, Naruto raising his little brother could involve a lot of character development for both. Naruto would have to learn patience and responsibility as a caregiver. His little brother could look up to Naruto and want to be just like him. They might also have a special bond because of their shared family connection. For example, Naruto could tell his brother stories about their parents, and this could inspire his brother to strive for greatness in the ninja world. They could also face challenges from the village, as some might be skeptical of Naruto's ability to raise a child, but they would prove everyone wrong through their strong bond and determination.
Well, perhaps in the fanfiction, Harry's little sister has some unique magical ability that attracts unwanted attention. Harry then has to raise her while constantly fending off those who would use her for their own purposes. He would have to balance being a brother and a protector, making sure she grows up happy and safe in a rather dangerous magical environment. He might also introduce her to his friends at Hogwarts for support and guidance as she gets older.
Naruto's life would be filled with new experiences. He'd have to learn how to be a role model. This means not just showing off his ninja skills, but also teaching his brother about values like honesty and loyalty. He'd also have to deal with his brother's emotions. For instance, if his brother gets bullied, Naruto would need to step in and handle the situation in a way that both protects his brother and teaches him how to stand up for himself. And he might start to see the village in a different light, as he now has a family member to look after and wants to make the village a better place for his brother to grow up in.
The plot might involve Naruto trying to adapt to the new environment of being related to Rias. Since he has his own strong sense of justice from his ninja world, he could conflict with some of the more underhanded tactics in Rias' world. But in the end, they work together to overcome difficulties. For example, when facing a powerful enemy that neither of them could handle alone, they combine Naruto's ninjutsu and Rias' devil powers to defeat it.
Well, it could be about Naruto's little brother being in a strange world where he meets Cynthia. Maybe they team up to fight some common enemies. For example, they could be facing off against some powerful ninja - pokemon hybrids.
Well, it could be about Naruto having a new family dynamic where he's the little brother to Hana. Maybe they go on adventures together in the Hidden Leaf Village, facing challenges and growing closer as siblings. It could also involve Naruto learning new skills from Hana or vice versa.
One idea could be that the little brother gets involved in a mystery that Naruto is too busy to handle. He teams up with some unlikely allies, like a rogue ninja who has a change of heart. Together, they uncover a conspiracy within the village that threatens the peace. The little brother has to use his wits and newfound ninja skills to expose the plot and save the day, all while trying to prove himself to the village and his famous brother.
In this fanfiction, Naruto's ninja skills could play a role in his sister's protection. He might teach her basic self - defense moves early on. Also, his friends in the village could become like aunts and uncles to his sister, providing different kinds of support and influence. For instance, Sakura could teach her some medical knowledge.
One possible plot could be that Naruto discovers an orphaned child during one of his missions. He decides to take the child under his wing and raise it as his own. He would teach the child ninjutsu, just like Jiraiya taught him, and also instill in the child the values of hard work and loyalty.
Well, one possibility is that Goku, with his powerful Saiyan abilities and big heart, teaches Naruto new combat techniques. Maybe he shows Naruto how to better control his chakra by using some of the principles of Ki control in the Saiyan way. For example, Goku could help Naruto reach new levels of power in his Rasengan by adding elements of his Kamehameha's energy concentration.
One possible plot could be Naruto taking on the role of a mentor and father figure to Naruko. He might teach her all the ninja skills he has learned, like how to perform the Rasengan. And also, he could guide her in understanding the importance of friendship and loyalty, just as he experienced with his own friends in the original series.