Naruto would be devastated. He has always idolized his father, so being betrayed by him would shatter his world. At first, he might be in denial, not wanting to believe that Minato could do such a thing.
Yes, there are likely some fanfictions out there with such a concept. You can try searching on popular fanfiction websites like Fanfiction.net or Archive of Our Own. Just type in 'Naruto Father of Minato' in the search bar and see what comes up.
Naruto could pass on his determination. He's always been someone who doesn't give up easily, and Minato might inherit that. Also, his loyalty. Naruto is extremely loyal to his friends and the village, and Minato could grow up with those values. Maybe even Naruto's love for ramen would be passed on in some comical way.
Well, Minato being the calm and collected type, would probably approach reading Naruto fanfiction with an open mind. He might find some of the stories that depict his heroics in new and interesting ways quite fascinating. Kushina, on the other hand, would be more vocal. She'd either love the fanfiction that shows her as a loving mother and strong kunoichi or be a bit critical if it doesn't match her self - image. For example, if a fanfiction portrays her as too weak, she'd be likely to scoff at it. But overall, they'd both enjoy seeing the different ways the fans have imagined their lives.
Well, Minato might be proud to see how his son Naruto has been portrayed in the Naruto Shippuden fanfiction. He could also be impressed by the creativity of the fans in coming up with new storylines. Kakashi would likely enjoy reading different takes on his own character and the battles he's been in. Rin would probably be excited to see how her character has been explored in different ways, whether it's her relationship with Kakashi or her role in the overall story. Obito might have mixed feelings. He might be angry if the fanfiction misrepresents his motives, but also intrigued if it offers a new perspective on his journey.
The relationship can be developed by having Minato appear in Naruto's memories more vividly. For example, Naruto could start having flashbacks of Minato's training sessions or family moments that he didn't know about before. This would make Naruto feel closer to his father.
Naruto would experience a huge shift in his identity. He'd go from being the son of Minato (in the original story) to being Minato's father. This would likely make him more responsible and mature. He'd have to think about protecting Minato and guiding him, which is different from his usual role of being the underdog striving for recognition.
The story could also start with a strange genjutsu or curse that alters reality. Naruto wakes up one day and suddenly he's in a world where he's Minato's father. He has to navigate this new family dynamic while also dealing with the political and ninja - related issues in the village. Since Naruto has always desired a family, this new situation could bring out new sides of his character, both in terms of his paternal instincts and his leadership within the family and the village.
Well, it could be quite complex. Firstly, the writer would have to re - imagine the entire Naruto lore to some extent. Since Naruto is known to be Minato's son in the original series, for Naruto to be the father, there would need to be a major shift in the story's dynamics. It could involve a lot of changes in the relationships between characters. For example, how would Kushina react to Naruto being Minato's father? And how would Naruto, who has his own set of values and experiences from his own time, raise Minato? There are so many possibilities to explore.
Minato and Kushina's reactions could vary widely. Minato, being a strategic thinker, might initially be skeptical about how well the two very different universes of Naruto and RWBY can be combined in fanfiction. But as he reads on, he might appreciate the creativity involved. Kushina, with her fiery personality, could be excited or even a bit outraged if the fanfiction takes too many liberties with the Naruto characters she loves. She may also find it interesting to see new adventures for Naruto and his friends in this RWBY - inspired setting.