Perhaps in the fanfiction, Naruto and Pain team up against a greater threat. They put aside their differences as Naruto's ability to forgive and see the good in people makes Pain re - evaluate his own actions. This could lead to a whole new adventure where they combine their powers in unexpected ways.
Another plot could be that Naruto falls in love with a character related to Pain. For example, he might develop feelings for Konan, who was closely associated with Pain. This could create a love triangle - like situation where Naruto has to navigate his feelings while also dealing with the political and ideological differences between his world and Pain's.
One interesting plot could be Naruto delving deeper into the understanding of pain not just physically but also the emotional pain of his enemies. This might lead to him trying to find more peaceful solutions in battles.
One interesting plot could be a story where fem Pain has a change of heart due to Naruto's unwavering belief in peace. Maybe she starts to question the path of destruction she was once on and joins Naruto in his quest to bring harmony to the ninja world.
In some fanfictions, Kaguya might be reincarnated in a different form and meet Naruto during his early days of training. Their encounter could be filled with mystery as Naruto senses a strange power in her, and this could lead to a love story that also involves Naruto learning about ancient powers from her.
Obviously, Naruto and Pain are the main characters. Naruto, the energetic and determined ninja from Konoha. Pain, on the other hand, is the complex antagonist with his own set of beliefs about peace through pain. Their interactions are likely to be the focus of the fanfiction.
One interesting plot could be Merlin hiding his pain from Arthur because he doesn't want to seem weak. He might endure the taunts of the knights in silence while secretly using his magic to heal his internal wounds. Another could be Merlin hiding his pain over his mother's absence or the fact that he has such a huge responsibility on his shoulders with his destiny to protect Arthur and Camelot.
A plot could also revolve around Naruto and Yugao having to hide their relationship due to some political or village - related reasons. They would then have to navigate their feelings while keeping it a secret from others, which could lead to a lot of tense and emotional moments.
Some fanfictions might explore a plot where Naruto, while on one of his solo training missions, stumbles upon a den of female foxes. These foxes are not ordinary; they possess magical powers. One of the female foxes, who is particularly curious about the outside world, befriends Naruto. As they spend more time together, Naruto starts to develop feelings for her. Another plot could involve a group of female foxes who are reincarnations of ancient warriors. Naruto gets involved with them when they are awakened from their slumber, and he is drawn to their strength and grace, eventually falling in love.
One interesting plot could be Paul's internal struggle as he realizes his feelings for Ash. He might initially resist these feelings because of his competitive nature. For example, he could be in denial and act even more aggressively towards Ash in battles, but then gradually show his softer side outside of the competitive arena.
One interesting plotline could be Naruto having to face Pain alone without any backup from the village. This would really test his strength and determination. Another could be Naruto finding a way to defeat Pain without using his full Nine - Tails power, relying more on his ninja skills and strategy.
Another plotline could involve Naruto using his strong will and the power of friendship. Maybe he gets some unexpected help from his friends in a way that gives him the edge over Pain. Like, Shikamaru could come up with a brilliant strategy that Naruto executes perfectly.