One plot idea could be that Naruto decides to follow in Jiraiya's footsteps as a spy. He disguises himself and infiltrates an enemy organization. Just like Jiraiya, he has to gather intelligence while also being careful not to blow his cover. Another idea is that Naruto starts his own training school in the style of Jiraiya, teaching a new generation of ninjas his unique techniques and the values he learned from Jiraiya.
A plot could involve Naruto writing a book series inspired by Jiraiya's Icha - Icha series. But instead of being about adult themes, it's about the history and legends of the ninja world. As he travels around to gather stories for his book, he encounters various challenges and meets new characters. He also uses his influence as a hero to promote peace through the stories in his book, much like Jiraiya used his writing in his own way.
In a fanfiction, Naruto could go on a long - term solo mission like Jiraiya did. During this mission, he discovers a new form of chakra or a long - lost ninja technique. He then has to master it while also dealing with the isolation. Just as Jiraiya came back stronger from his travels, Naruto returns to the village with newfound knowledge and power, ready to protect the village and pass on what he's learned to the next generation.
To act like Jiraiya in fanfiction, Naruto should adopt Jiraiya's courage. Jiraiya was never afraid to face strong opponents. Naruto could show this by taking on difficult missions alone or standing up against powerful villains without hesitation. Jiraiya was also a bit of a loner at times, and Naruto could have moments in the fanfic where he goes off on his own to train or to think. This would add depth to his character, showing that he's not just the boisterous Naruto we know, but also someone who can be introspective like Jiraiya.
One idea could be that Jiraiya focuses on Naruto's rasengan training in a more extreme way. He takes Naruto to a secluded place full of natural challenges like strong water currents or rocky terrains. There, Naruto has to constantly adapt and use his rasengan in different situations to overcome obstacles. Another plot could involve Jiraiya teaching Naruto some secret clan jutsus that he discovered during his travels, which could give Naruto an edge in future battles. And also, Jiraiya could train Naruto in stealth and espionage skills, which are essential for a shinobi but Naruto hasn't had much focus on before.
Another plot could involve the OC being a bit of an outcast among the other students because of their unique abilities. Jiraiya takes the OC under his wing more closely. Meanwhile, Naruto befriends the OC. As they train together, they discover a hidden power within the OC that is related to an ancient clan. This discovery leads to a series of adventures as they try to learn more about the OC's heritage.
One plot idea could be that in an alternate universe, Fem Jiraiya is Naruto's mentor instead of the male Jiraiya. She could teach him some unique jutsu that are different from the original. Another idea is that they go on a journey together where Fem Jiraiya has a secret mission related to Naruto's heritage and they gradually develop a deep bond. Maybe she has a different approach to training Naruto, focusing more on his chakra control from the start which gives Naruto an edge in his development.
One plot idea could be Jiraiya training Kushina. Since he was a great ninja and had a lot of knowledge, he could pass on some unique jutsu or survival skills to her. This would not only strengthen Kushina but also create a bond between them based on mentorship.
Well, perhaps there could be a plot where they both get trapped in a mysterious dimension. In this dimension, they have to rely on each other's skills. Jiraiya's knowledge of sage mode and Orochimaru's various jutsu could be combined to find a way out. It could also explore their relationship in a more in - depth way as they face different challenges together.
One plotline could be Naruto going on a journey to write a book about the ninja world, just like Jiraiya did. Another could be Naruto using Jiraiya's flirting techniques on Sakura, which would create a lot of comical and awkward situations. Maybe Naruto starts his own toad - summoning school, inspired by Jiraiya's connection with the toads.
One possible plot could be that Jiraiya is forced to betray Naruto due to some external threat. Maybe an enemy has captured Jiraiya's loved ones and threatened to kill them if he doesn't turn on Naruto. Jiraiya, in a difficult position, might have to pretend to be against Naruto to protect his loved ones while secretly trying to find a way to free both Naruto and his family from the enemy's clutches.
Well, one possibility is that Naruto would grow up with more focused and intense training. Jiraiya could pass on his unique jutsu more directly. Maybe Naruto would learn about the world outside of Konoha in a more in - depth way earlier on, traveling with Jiraiya and having adventures that shape his understanding of the ninja world and his place in it.
The plot could revolve around Naruto and Jiraiya going on a secret mission together. During this mission, Naruto discovers more about his family's past through Jiraiya's knowledge. They might encounter an ancient evil that was known to Naruto's parents, and Naruto has to use the skills he's learned from Jiraiya to combat it.