In fanfiction, their relationship can be developed by having Naruto and the Fem Kyuubi face challenges together. For example, they could be on a journey to find a lost artifact that has the power to change the balance of the ninja world. Along the way, they encounter various obstacles such as other powerful shinobi who want the artifact for themselves. These challenges force them to communicate, support each other, and understand each other better. Another aspect could be Naruto helping the Fem Kyuubi to overcome her own insecurities or fears, which she may have due to her unique existence as a tailed beast. This would strengthen their bond.
One way to develop their relationship is through shared goals. Maybe they both want to bring peace to the ninja world in different ways. Naruto with his ideology of friendship and the Fem Kyuubi with her understanding of the deeper powers and politics in the world. They could team up to stop a powerful enemy that threatens both of them. As they work together towards this goal, they start to rely on each other more and more, and their relationship deepens. Also, they could have cultural exchanges, like Naruto teaching the Fem Kyuubi about human emotions and she teaching him about the history of chakra.
The relationship can be developed through mutual respect. Naruto could respect the Fem Kyuubi's power and knowledge, and in return, she could respect his determination. For instance, they could start off as wary of each other but gradually learn to trust. They might share stories about their pasts, with Naruto talking about his lonely childhood and the Fem Kyuubi about her long existence. This sharing could create a connection between them.
Their relationship can start with mutual respect. Naruto, in his godlike form, respects the power of the Fem Kyuubi. The Fem Kyuubi, in turn, respects Naruto's newfound divinity. This respect can gradually turn into friendship as they fight side by side.
The relationship can start with mutual mistrust. Since the Kyuubi has a history of being feared, Naruto might be cautious at first. But as they interact more, they find common ground, like their shared love for the forest around the village. This simple shared interest can start to build a bond.
They could form a partnership based on mutual respect for their power. They both possess incredible power, and they could work together to keep the balance in the ninja world. They might travel to different villages to prevent small - scale conflicts from escalating, using their combined strength and influence to promote peace and understanding between different ninja clans.
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.
Their relationship could start with mutual understanding. Naruto, who has always had a connection to the Kyuubi, now with a female form, could start to see her as more than just the beast inside him. They could have conversations about his dreams and her past.
One way is through shared experiences. If they are both put in a situation where they are in danger, like being trapped in a genjutsu together. They have to work together to break free. This would force them to communicate and rely on each other. Also, the male Kyuubi could start to see Naruto's dreams of peace and be influenced by them. He might then start to support Naruto more actively in his pursuits.
The relationship can be developed through shared battles. When they fight side by side against foes, they can start to trust each other more. For instance, if they face a powerful enemy that neither could defeat alone, they would rely on each other's strengths.
In fanfiction, Tsunami might have a special ability that can soothe the Kyuubi's wild nature. Naruto, being the host of the Kyuubi, is amazed by this. They start to work together, with Tsunami using her ability regularly on the Kyuubi. This leads to a more harmonious relationship between Naruto and the Kyuubi, and also a deep friendship between Tsunami and both Naruto and the Kyuubi as they rely on each other more and more.
Their relationship could also grow through mutual respect. The female Kyuubi respects Naruto's strength and determination, and Naruto respects her power and the fact that she has been trapped for so long. This respect can lead to a friendship or even something more as they rely on each other more and more in difficult situations.
At the beginning, it might be a strange and unexpected connection. But as they spend more time together, it turns into a deep emotional bond. Naruto's kind heart might make the fem Kyuubi feel things she's never felt before, and she starts to change for the better.