Well, in some fanfiction concepts, it could be possible through some sort of magical or spiritual connection that was misinterpreted in the Naruto universe. Maybe there was a powerful jutsu in the past that bound Naruto's essence to the Kyuubi in a way that made it seem like he was its father in this alternate storyline.
One possible way for Naruto to be the Kyuubi's dad in fanfiction could be related to the idea of Naruto having a special, hidden power. This power might have been involved in the birth or formation of the Kyuubi. It could also be that Naruto's unique will and determination, which are his most prominent traits, had an impact on the Kyuubi's existence at a fundamental level, leading to this rather unusual relationship.
In this kind of fanfiction, it might be that there's a special crossover event. For example, perhaps there's a powerful entity that messes with the fabric of reality and combines elements from the Naruto and Dragon Ball universes in a strange way. This could lead to Naruto being Trunks' dad in this fictional setting. It's all about the creativity of the writer who wants to explore new and unexpected relationships between different fictional worlds.
Yes, there are quite a few out there. Some explore how Naruto's life would be different if the Kyuubi was his dad. They often involve unique power developments and interesting family dynamics.
At first, Naruto might see the Kyuubi as just a source of power. But as he starts to protect it, he realizes it's more of a partner. Their relationship evolves from a simple user - power source dynamic to a deep - seated friendship. He begins to understand the Kyuubi's emotions and past, which further cements their bond.
In this fanfiction, their relationship becomes more of a partnership. Instead of Naruto just using the Kyuubi's power, they work together as brothers. Naruto might start to understand the Kyuubi's feelings and motives better.
One common theme is power inheritance. Since the Kyuubi is extremely powerful, the fanfictions often explore how Naruto inherits and uses that power. Another theme is family acceptance. Naruto has to come to terms with having the Kyuubi as his dad.
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.
In fanfiction, Naruto's relationship with the Kyuubi can be developed by having them communicate more often. For example, Naruto could start to have regular conversations with the Kyuubi in his mind. This would allow them to understand each other better.
The relationship with the girl Kyuubi could develop in a more romantic way. Naruto's relationship with the regular Kyuubi was mainly about power and control. But with the girl Kyuubi, there could be a lot of mutual understanding and attraction. They might go on dates in the Hidden Leaf Village, sharing their feelings and secrets. Also, she could use her unique Kyuubi - related powers to help Naruto in a more gentle and collaborative manner, rather than just raw power like the regular Kyuubi.
Well, perhaps Naruto, having grown up without his real mother, is seeking some kind of maternal connection. And the Kyuubi, being such a powerful and dominant force within him, fills that void. It could also be that Naruto senses a deeper, more primal bond with the Kyuubi, something that goes beyond just being a host and a tailed beast, and he associates that bond with a mother - child relationship.
In such fanfiction, their relationship often develops through mutual respect. Naruto no longer sees Kyuubi just as a source of power but as a friend. Kyuubi, in turn, starts to value Naruto's determination and kindness. They might have heart - to - heart conversations in Naruto's mindscape, sharing their past traumas and hopes for the future.