A theme that often comes up is his physical pain and how he endures it. This can be used to show his strength and tenacity. For example, in a battle - themed fanfiction, he endures great pain but still manages to fight for the sake of his village. Also, the theme of self - discovery through pain is common. As he experiences pain, he learns more about himself and his limits.
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.
The biggest difference is the creativity of the fanfiction writers. In the anime, the fight follows a set storyline. But in fanfiction, anything can happen. For example, Naruto could suddenly gain a new power that was never in the anime. It's like a whole new world of possibilities.
The theme of sacrifice could also be present. Both characters are willing to sacrifice for their causes. In the context of a yaoi fanfiction, this could translate into sacrifices for each other. For example, Pain might sacrifice his original plans for world domination for Kakashi, or Kakashi might put his village - related duties on hold to be with Pain, exploring the lengths they would go for their relationship.
Another possible fanfiction could be centered around Kakashi's pain from his past traumas, like the loss of his father. It could show how these past experiences resurface when he faces a new threat in the village. The story could detail how he overcomes this pain by finally coming to terms with his past and using it as a source of strength.
Konan could be really interesting. In some fanfictions, she might have a different backstory or motivation that affects the Naruto vs Pain fight. For example, she could be secretly trying to stop Pain from going too far in his destruction of the Leaf Village.
Well, Kakashi might be really engrossed. Since Jiraya is a great writer in the Naruto world, Kakashi could be learning a lot from those novels. Maybe he finds some new ninjutsu concepts or interesting stories about the shinobi world in them.
A good Spiderman vs Batman reaction fanfiction should have well - developed characters. It should stay true to the essence of both characters. For example, Spiderman's quippy nature and Batman's brooding seriousness. The plot should be engaging, not just a simple fight. Maybe there could be a misunderstanding that leads to the conflict. And the setting can add a lot to the story too. If it's set in a shared universe where both heroes have to deal with new threats while also facing each other, that could be really interesting.
I think Spiderman would have an edge in a fight against Batman. His powers are more innate. He can swing from building to building effortlessly and has a much stronger physical strength compared to Batman. Batman is just a human, albeit a very well - trained one. In the fanfiction world, though, the story could be twisted to make Batman's gadgets and strategic mind overpower Spiderman. But overall, Spiderman's natural abilities give him an upper hand.
Minato might also be a prominent character. As their teacher, he can influence the way Obito and Kakashi interact. In some fan fictions, he could be the one to help them resolve their differences or provide some crucial information about their past that changes their current situation.