One plot idea could be Fem Naruto and Sai going on a mission together in a foreign land. They encounter strange new enemies and have to rely on each other's unique skills. Sai, with his art-based jutsu, and Fem Naruto with her strength and determination. Another idea is a story where they are both training under a new master who has a very different style of teaching compared to what they are used to. This could lead to a lot of character growth and new jutsu development for both of them.
A possible plot could be that Fem Naruto and Sai get caught in a time - travel jutsu gone wrong. They end up in the past, before the founding of Konoha. There, they have to adapt to the primitive ways of the ninja world at that time while also trying not to change history too much. Or perhaps a plot where Fem Naruto is framed for a crime she didn't commit, and Sai is the only one who believes in her innocence. He then helps her clear her name while also uncovering a conspiracy within the village.
There might be a fanfiction where Fem Sai is an artist and Naruto is intrigued by her art. She uses her art to communicate in ways that are different from the norm in the ninja world. Naruto tries to understand her art better and in the process, they develop a special bond. Maybe they end up collaborating on a project to create a mural that represents the unity of the village.
One plot idea could be Sai trying to understand the deep bond between Naruto, Sakura and Sasuke. He might initially struggle as he has his own unique upbringing. For example, he could be assigned a mission with the three of them and slowly learn about their history, like Naruto's determination to bring Sasuke back and Sakura's unrequited love for Sasuke in the beginning. This could lead to Sai having a new perspective on friendship and loyalty.
One plot idea could be that Fem Naruto, having a unique bond with Fem Kyubi, goes on a journey to discover more about the origin of the Kyubi's power. They face various challenges together and in the process, Fem Naruto learns to control and utilize the Kyubi's power in new ways.
One idea could be that Fem Jason is a new shinobi in the Naruto world. She has unique combat skills from her own universe that she tries to blend with ninja techniques. For example, she might use her acrobatic skills from being a vigilante in her world to outmaneuver opponents in the chunin exams.
In a fem Naruto neglected fanfiction, a possible plot could be that she is constantly overlooked for important missions. As a result, she takes on her own self - assigned missions to prove her worth. Along the way, she discovers a hidden power within herself that is related to her female identity and the Nine - Tails, which she uses to save the village in a time of great crisis.
A possible plot could be that fem Tobi is an outcast in her own village because of her strange abilities. Naruto, being the empathetic person he is, reaches out to her. They then team up to fight against a common enemy that threatens both of their villages. Along the way, they discover that their destinies are intertwined in a much bigger prophecy. This could lead to many adventures and character - building moments for both of them.
Well, a cool plot could be Fem Naruto and Sasuke are both entered into a ninja tournament. They start off as rivals but as the tournament progresses, they start to respect each other's skills more. And perhaps there's a mystery behind the tournament that they end up uncovering together. Or maybe Fem Naruto has a special power that only Sasuke can help her control, and in the process of training together, they form a deep bond. Another one is that they are both transported to a modern world and have to adapt while still relying on their ninja skills, and during this time, their relationship evolves in unexpected ways.
Another interesting plot could be a time - travel scenario. Fem Deidara travels back in time and meets a younger Naruto. She decides to change the course of events in the ninja world by training Naruto in some unorthodox ways, using her explosive art as a form of training to make Naruto more powerful in a different way than he was originally trained.
One plot idea could be a story where Fem Naruto and Inuyasha team up to fight a common enemy. Maybe a powerful demon that has the ability to disrupt the balance between the ninja world and Inuyasha's feudal Japan. They could combine their unique powers, like Naruto's ninja skills and Inuyasha's swordsmanship and demon powers.
Perhaps fem Hidan is actually a misunderstood character. In the fanfiction, she could be a part of a secret clan that was wronged in the past. Naruto, with his ability to see the good in people, tries to befriend her. This leads to a series of adventures where they team up against common enemies, and fem Hidan has to learn to control her violent tendencies under Naruto's influence.