Well, one possibility is that Naruto might be really confused at first. He'd see this different version of himself as a female and might not immediately understand the situation. He could try to figure out how this time - travel happened and what it means for his world. Maybe he'd start to learn about the differences in how female Naruto is treated in this new world compared to his own experience as a male.
He'd probably be super surprised. I mean, seeing yourself as the opposite sex is not something that happens every day. He might blurt out something like 'Who are you? You look like me!' and then start to realize the situation. He could be a bit embarrassed too, especially if female Naruto had some different mannerisms or ways of dressing.
The relationship would become more complex. If Naruto time - travels, he might see Kakashi in a different light, as someone who was once young and inexperienced. Kakashi, on the other hand, would be intrigued by this strange kid with such advanced skills. They could become closer as friends, with Naruto sharing his future experiences and Kakashi guiding Naruto in the past world.
Another theme is self - discovery. By going back in time and seeing their past selves, they learn more about who they are and how they've changed. Naruto might realize how much he's grown in terms of his ninja skills and his relationships. They also understand their roles in the grand scheme of things better.
One idea could be that Sarada travels back in time and initially mistakes Naruto for Sasuke. This could lead to some humorous misunderstandings as she tries to interact with him. For example, she might challenge him to a fight thinking he's Sasuke, only to be completely surprised by Naruto's different fighting style and personality.
At first, Naruto might be scared or wary of Fem Kyuubi. But as time passes, he starts to see her as a protector. She teaches him about his own power and the secrets of the chakra. Their relationship becomes more of a student - teacher one. Then gradually, it turns into a deep bond like a mother - son relationship. Fem Kyuubi starts to care for Naruto not just as a vessel but as a person she has a connection with.
One great fem Naruto x fem Kyuubi fanfiction could be one that focuses on their unique bond. It might explore how they interact in a world where Naruto is female and the Kyuubi also takes a female form. For example, it could show them teaming up against common enemies and how their combined powers are different from the original story.
Another character could be Kakashi. Maybe he has to make a tough decision that goes against Fem Naruto's wishes. For example, not allowing her to go on a dangerous mission she really wants to. This could make Fem Naruto feel betrayed and heartbroken, as Kakashi is a respected figure in her life.
Sakura could be one of her main allies. Sakura, with her medical skills, would be invaluable in taking care of the injured in Fem Naruto's growing empire. Also, Shikamaru, with his intelligence, could help in strategic planning and dealing with political matters.
Fem Naruto's appearance would change in several ways. Her body shape would be more feminine, with curves. Her eyes might be a bit larger and more expressive. In terms of hair, not only would it be long, but she could also style it in different ways, like braids or ponytails. And her skin tone might be a bit fairer compared to Naruto. She would also have a more slender build overall.