With Sakura, she might be initially scared of Naruto. However, as she realizes that he's still the same Naruto deep down, she could become more protective of him. She might also study more about the Kyuubi's transformation to try and help Naruto adjust.
His relationship with Sasuke would likely be very different. Sasuke might be more suspicious of Naruto at first, seeing him as an unknown entity. But as they learn more about Naruto's new situation, they could develop a deeper bond based on Naruto's unique perspective.
With Sakura, she might be initially scared but then come to see Naruto as someone she needs to protect even more. She could develop new medical techniques specifically to help Naruto in case the Kyuubi's power ever goes out of control. And she would probably be more in awe of his strength and try to learn from him how to be stronger herself.
If Naruto were not human, his relationships would likely be very different. For example, his relationship with Sasuke might be more strained. Sasuke, who is very focused on power and revenge, might see Naruto as a greater threat if he's not human. He could view Naruto's non - human abilities as something to envy or fear. With Sakura, she might be more hesitant around Naruto. Instead of her initial crush, she could be more cautious, not knowing what Naruto is truly capable of.
In this fanfic scenario, Naruto's relationship with Iruka would be tested. Iruka, who has always seen Naruto as a student and a friend, would now have to deal with a Naruto who is part - nine - tails. He would worry about Naruto's future and how society will accept him. Naruto's interactions with the other jinchuriki could also change. They might sense a kinship with him in a different way now that he has fully become a nine - tails. And his relationship with Tsunade would likely involve her trying to find a way to either reverse the transformation or make sure Naruto can control it, while also dealing with the political unrest that might come from Naruto's new state.
Naruto's relationship with Sasuke might be different. Instead of the rivalry based on power and recognition, Sasuke could be more jealous of Naruto's unique bond with the female Kyuubi. Naruto's friends like Sakura might also view him with a bit of awe and fear initially, since he is being raised by such a powerful and feared being. The village elders would likely be more distrustful of Naruto, thinking that the female Kyuubi is influencing him in a negative way.
With his mentor or teacher figure, the dynamic would shift. Instead of being the student who is learning, Robin as a kid might be more in need of basic life lessons. His friends who were used to his equal partnership would now have to be more patient and understanding. They might find his child - like innocence endearing but also frustrating at times. And his relationship with any rivals could become more complex as they might not know how to deal with a kid version of him.
His relationship with Gray might become more complicated. Gray might be more hesitant to pick fights with Natsu now that she's a girl. And with Lucy, they could become closer as girlfriends, sharing more secrets and having sleepovers. Natsu might also attract new male friends who are interested in her as a girl.
His relationship with Hermione would be really different. As a kid, he might be more open about his feelings for her in an innocent, child - like way. He could be constantly following her around, wanting to be involved in whatever she's doing, like when they were younger in the original story but even more so. With Harry, they would probably get into more silly adventures together, like building forts in the Gryffindor common room or trying to catch magical creatures in the castle grounds.
His relationship with Sasuke would be different. Sasuke might view Naruto's connection with the Fem Kyuubi as a new source of power and be more wary or even jealous. But Naruto could use his new situation to try and bring Sasuke back to the right path earlier.
His relationship with Sasuke would likely be affected. Sasuke might initially be suspicious of Naruto's new form, thinking it could be a trick by an enemy. But as time goes on, they could find new ways to work together. Naruto's new Kitsune powers could complement Sasuke's skills. For example, Naruto could use his enhanced speed as a Kitsune to keep up with Sasuke in combat.
With Sasuke, their rivalry might take on a new dimension. Sasuke could be both intrigued and threatened by Naruto's robotic abilities. He might see Naruto as an even greater obstacle to his own goals, or he could potentially try to use Naruto's robotic side for his own purposes.