If there was a situation where Naruto was in great danger and Kurama had to sacrifice some of his power to save him. This selfless act would deepen their connection. Also, if Naruto started to dream about Kurama's past and they could communicate through these dreams, it would be a new way to explore and develop their relationship.
Another way is if Naruto starts to teach Kurama about the positive aspects of human nature, like friendship and loyalty. This could make Kurama more empathetic towards humans and strengthen their bond. Kurama, in turn, could share his ancient wisdom with Naruto, making Naruto a wiser ninja.
Their relationship could develop further if they face a really tough challenge together, like a super - strong enemy. Through that struggle, they would understand each other better. For example, if they have to fight an enemy that can manipulate time, they would need to trust each other completely and that would strengthen their bond.
Their relationship could be developed further through mutual understanding. For example, Naruto could learn more about Kurama's past and the reasons for his anger and hostility in the beginning. This would make Naruto more empathetic towards Kurama, and Kurama in turn could start to trust Naruto even more.
To develop their relationship in the fanfiction, start with small acts of kindness. Naruto could bring Kurama some food from the human world that he thinks Kurama might like. Then, gradually build up to more significant events. Let them protect each other. For example, when Naruto is in danger, Kurama could use his own power in a new way to save him. And vice versa. Also, introduce some external factors that force them to rely more on each other, like a prophecy that says only their combined efforts can save the ninja world. This would make them realize the importance of their bond even more and deepen their relationship as brothers.
As Kurama teaches Naruto seals, they develop a sort of teacher - student bond. Naruto respects Kurama's wisdom, and Kurama in turn respects Naruto's determination to learn. This bond might lead to them having more in - depth conversations about the nature of chakra, the history of sealing techniques, and even their own pasts. For example, Kurama might share stories about how certain seals were created in the ancient times and how they were used in battles. Naruto, on the other hand, might tell Kurama about his dreams for the future of the ninja world and how he plans to use these new sealing techniques to bring peace. Through these exchanges, their relationship becomes more complex and multi - faceted.
The relationship might also develop due to external factors. For example, if the Hidden Leaf Village is in danger and Naruto has to rely on Kurama's power more than ever. Kurama, seeing Naruto's determination to protect his home, decides to fully cooperate and they end up having a stronger connection as a result of this crisis.
In terms of their relationship development, a female Kurama could bring out a different side of Naruto's personality. She might encourage Naruto to explore his more sensitive and empathetic side. This could lead to Naruto making different decisions in battles and in his relationships with other characters. For instance, he might be more likely to try to understand his enemies' motives rather than just fighting them head - on. Also, their bond could be more of a partnership based on mutual respect and shared emotions rather than just a power - based relationship like it was with the male Kurama at the start.
Their relationship might become more of a strategic partnership. Naruto would respect Kurama's power and knowledge more deeply as they face the complex and dangerous ANBU missions together.
Often, it starts with Naruto delving deeper into his connection with Kurama. He might try to understand Kurama better, which in turn makes Kurama more open to him. For example, Naruto could spend time meditating to strengthen their link.
Their relationship would likely deepen with trust. Naruto would be extremely grateful to Gaara for saving him, and this would strengthen their bond. They might start sharing more about their past traumas and how they overcame them.
Their relationship would likely become deeper and more trusting. After Naruto saves Lee, Lee would be extremely grateful and would look up to Naruto even more. He might start to train with Naruto more often, trying to learn some of Naruto's unique jutsu.