Naruto's character often develops in terms of his emotional maturity. In a harem situation with a fem Kyuubi, he has to handle multiple relationships, which makes him more understanding and empathetic. He also might develop his leadership skills as he is sort of the center of this group. He'll learn to make decisions that benefit the whole 'harem' and not just himself.
Well, often there's a theme of love and loyalty. Since it's a harem situation, Naruto has to navigate his feelings among the different members of the harem, which includes the fem Kyuubi. There can also be a theme of adventure. Maybe they go on quests together or face challenges as a group. And sometimes, there's a theme of self - discovery. Naruto might discover new aspects of himself through his interactions with the fem Kyuubi and the other harem members.
Naruto's character might develop in terms of his power control. With Amaterasu in the mix, he has to learn to be more cautious as it's a very destructive force. The Fem Kyuubi could also teach him patience. For example, he may become more strategic in battles instead of just relying on brute force. He could also develop more emotional depth as he navigates the complex relationship with the Fem Kyuubi and the power of Amaterasu.
At first, it might be a relationship of mutual suspicion. Naruto is used to seeing Kyuubi as a source of power but also a potential threat. As the story progresses, they start to understand each other more. For example, through shared experiences in battles.
At first, Naruto might be a bit scared or hesitant. But as the fem Kyuubi shows her caring side, like protecting him from danger, Naruto starts to trust her. As time goes on, they become more like family. The fem Kyuubi shares her wisdom with Naruto, and Naruto in turn shows her the value of human emotions.
Naruto's development would be shaped by his interactions. In this fanfic, he'll be surrounded by kunoichi, which will change his view on gender roles in the ninja world. The Fem Kyuubi could be a catalyst for his growth. Maybe she has a tragic past that makes Naruto more determined to protect others. He'll also have to deal with the jealousy or admiration of the kunoichi towards him. All these factors will contribute to a Naruto who is more adaptable, understanding, and powerful in both physical and emotional aspects.
His character would take a dark turn. He'd likely become more aggressive. Without his humanity, Naruto may not show mercy or compassion in battles.
At first, their relationship might be based on mutual need. Naruto, being the one who wants to right the wrong of her banishment, and the Fem Kyuubi, who may need someone to help her. As they spend more time together, they start to understand each other better. Naruto sees the Fem Kyuubi not just as a powerful being but as a sentient individual with feelings. The Fem Kyuubi, in turn, realizes that Naruto is different from the others who feared or hated her. This understanding gradually turns into a deeper emotional bond, which could develop into love over time.
In many fanfictions, Fem Naruto might show kindness towards the Kyuubi. This kindness could be something the Kyuubi has never experienced before. For example, instead of just seeing it as a source of power, Fem Naruto might try to understand the Kyuubi's past and pain. This could lead to the Kyuubi gradually opening up to her and them developing a deeper bond.
In this scenario, Naruto would experience a significant shift in his character. He would be forced to make tough decisions. For example, he would have to choose between the village's rules and his loyalty to the fem Kyuubi. This would make him more mature. His relationship with the fem Kyuubi would also bring out a more protective side of him. He would have to learn how to control the power she represents in a new way. Additionally, being outside the village would expose him to different cultures and ways of life, which would shape his beliefs and values. All these factors combined would transform Naruto into a very different kind of shinobi compared to the one we know in the original series.
Naruto would likely become more in tune with his Kitsune side. He might gain more confidence as he realizes the unique powers it gives him. His relationship with the Fem Kyuubi would also force him to be more empathetic and understanding, as he has to deal with her complex emotions.