Yes. In many fanfics, Naruto is often depicted as stronger than Jiraiya. Naruto has the potential to grow far beyond his master. He has unique powers like the Nine - Tails chakra and has mastered many advanced jutsu over time, which can make him stronger in fan - created storylines.
In this fanfiction, Itachi might help Sakura become stronger by training her in various ninja skills. He could teach her advanced genjutsu techniques. For example, he might start with the basics of detecting and breaking genjutsu, and then gradually move on to creating complex illusions herself. This would enhance Sakura's ability to defend against and use genjutsu in battles.
Well, it depends on the specific fanfic. Some fanfics might focus on Naruto's growth post - Shippuden and give him abilities that make him stronger than Itachi. For example, they could have Naruto master a new form of Sage Mode that gives him an edge over Itachi's Sharingan - based techniques. However, other fanfics might keep Itachi's power level relatively high and not have Naruto overtake him. So, there's a lot of variation among different fanfics.
One reason is his Nine - Tails chakra. It gives him a huge power boost that Jiraiya doesn't have. Another is his ability to learn quickly. Naruto has shown throughout the series that he can pick up new jutsu fast.
Often, in fanfic, Naruto is made stronger than Itachi because the writers want to explore new story arcs. If Naruto is stronger, new and exciting battles and relationships can be created. For instance, Naruto could be the one to protect Sasuke from Itachi in a different way. Also, Naruto's positive and determined nature makes him a popular character to be super - powered in fanfics.
It could be Orochimaru. Since Orochimaru has a long - standing feud with Jiraiya and is always up to no good. If Naruto ditches Jiraiya, Orochimaru might see this as an opportunity to manipulate Naruto. He could try to convince Naruto that Jiraiya was holding him back and that he can offer Naruto more power, all while having his own evil plans for Naruto.
One possible plot development could be that as Sakura gets stronger with Itachi's help, she starts to gain the attention of other powerful shinobi. This could lead to some jealousy or admiration within the ninja community. For instance, some might see her new - found strength as a threat, while others might want to learn from her.
I'm not familiar with the specific 'the hero jiraiya novel' so I can't say for sure who the author is. It could be an independent author or part of a series written by a well - known writer in the genre of fantasy or adventure, but without further research, there's no way to know.
Many of the powerful characters in novels depended on the background and plot of the novel or story. In some classic novels such as Romance of the Three Kingdoms and Water Margins, many heroic characters were widely described, some of which were very powerful. For example, in the Romance of the Three Kingdoms, Cao Cao, Liu Bei, Guan Yu and the others were all very powerful, and Zhuge Liang was the best among them. In Water Margins, Lin Chong, Wu Song, Li Kui and the others were also very powerful.
It should be noted that the description of force in the novel often has a certain degree of fiction and exaggeration. Therefore, the specific judgment needs to be analyzed according to the specific plot and character image.
If it's an official novel related to a well - known series like Naruto where Itachi is from, it would be written by the authors associated with the Naruto franchise. However, if it's a fan - fiction 'itachi novel', then the author could be anyone from the vast community of fan - fiction writers. There are many fans who create their own stories based on their love for the character Itachi.