The 'jiraiya vs pain' in RWBY fanfiction could be a battle of wits as much as a battle of powers. Jiraiya is a very experienced ninja, and Pain has his own ideology - driven powers. In a RWBY setting, the battle could be affected by things like Dust, the special energy source in RWBY. Jiraiya might be confused by this new element at first, while Pain could try to incorporate it into his attacks. It would be a clash of two different power systems and fighting styles.
It's really hard to say who would win. Jiraiya has his Sage Mode which gives him enhanced strength, speed, and perception. But Pain has the Rinnegan which allows him to use powerful abilities like the Six Paths techniques. In the RWBY fanfiction context, it might depend on how well they adapt to the RWBY world. If Jiraiya can quickly figure out how to use Dust to his advantage, he might have an edge. But if Pain can use his powers to disrupt the balance of the RWBY world, he could also come out on top.
In this fanfiction, Jiraiya and Pain are the main characters in the fight. But from Konoha's side, Naruto is a very important one. His emotions for Jiraiya would be running high. Then there's Sakura, who is not only a skilled medic - ninja but also cares about the safety of the village. She would be worried about the outcome. And don't forget about the elders in Konoha. Their opinions and reactions to the fight would also play a part in the overall story of this fanfiction.
Well, you can expect a lot of intense emotions. Konoha characters would be on the edge of their seats, seeing Jiraiya fight Pain. There might be shock at Jiraiya's skills and the power of Pain's attacks. They could also be filled with pride for Jiraiya or fear for his safety. And of course, there would be a lot of reactions to the twists and turns in the fight, like gasps when Jiraiya makes a risky move or when Pain reveals a new jutsu.
I think young Sasuke would have a very intense reaction. He was so consumed by his hatred for Itachi at that young age. A Sasuke vs Itachi fanfiction would be like a trigger for him. He would be eager to see how the fictional fight is portrayed. If Sasuke in the fanfiction is shown as strong, it might fuel his own ego and make him strive even harder to become powerful. However, if the fanfiction shows Itachi as superior, it could enrage him. He might feel that it undermines his own goal of defeating Itachi and he might even want to find the writer to correct their 'wrong' view.
I like Naruto in these fanfics because he always stays true to his beliefs. He is constantly trying to bring Sasuke back to the village and is willing to fight for their friendship.
One of the best moments is when they have a rematch that showcases their growth. Naruto has become stronger with his new jutsu, and Sasuke has further mastered his Sharingan powers. The intense battle of ideologies during the fight is captivating.
In a fanfic, it really depends on how the author writes it. But if we base it on the original series' power scaling, Naruto has a higher chance of victory. He has learned from many battles and has a wider range of abilities compared to Jiraiya. Also, Naruto has a strong will that could give him an advantage when facing his old master in the Edo Tensei form.
Well, a possible plot point might be that Edo Jiraiya still retains some of his old teachings and uses them in an unexpected way against Naruto. For example, he could use some forgotten jutsu that Naruto has to figure out how to counter. This would add an element of mystery and a test of Naruto's knowledge and growth.