Well, perhaps fem Tobi is a time - traveler who comes to Naruto's era. She initially has a goal to change something in the past that involves Naruto. But as she tries to achieve her goal, she realizes that changing the past might have disastrous consequences. Naruto, with his positive attitude, convinces her to embrace the present. And together, they start a new journey to create a better future for both their worlds.
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.
In some fanfictions, Tobi's alternate personality might be related to a hidden past or a connection to a long - lost shinobi clan. This could lead to a whole new backstory for the character and add depth to his motives in the Naruto universe.
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.
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.
One idea could be a story where fem Naruto and Shikamaru are on a mission together in a mysterious forest. They encounter strange creatures and have to use their unique skills to survive. Fem Naruto could use her speed and agility, while Shikamaru uses his intelligence to strategize.
One idea could be that Fem Kabuto is a double agent working for both Orochimaru and Naruto's side secretly. She uses her medical ninjutsu skills to heal Naruto's team during a difficult mission, and in the process, she starts to question her loyalty to Orochimaru.
One plot idea could be that Fem Naruto, with her unique charm and determination, teams up with Hashirama in a time - travel scenario. They go back to the founding days of the village to prevent a great disaster that was previously hidden in history. Another could be a story where Fem Naruto discovers she has a special connection to Hashirama's chakra, which leads to her unlocking new powers and having to deal with the responsibilities that come with it.
Perhaps a story where Fem Katsuyu and Naruto go on a journey together to find a rare herb that can heal a deadly disease in the village. Along the way, they face various challenges and learn more about each other's strengths and weaknesses. Fem Katsuyu could use her knowledge of the natural world to guide them, and Naruto would use his combat skills to protect them.