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.
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.
In the fanfiction, their relationship could be shown as a source of strength. They might support each other while reading and discussing the oddities and interesting parts of the story. Their bond could be emphasized as they both come to terms with the strange new world of the crossover.
Minato might be intrigued. He would be interested in seeing how the fans expand on Naruto's journey. Kushina would be delighted, seeing her son as the center of so many different tales.
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.
One possible reason could be a misunderstanding. Maybe Minato thought Kushina had done something to endanger Naruto when in fact she hadn't. In the heat of the moment, he lost his temper and slapped her.
In a fanfiction, if Minato were to slap Kushina, it would be a huge shock to the Naruto - Kushina relationship. It could potentially cause a rift between Naruto and his father Minato in Naruto's mind. Also, Kushina would likely be deeply hurt and angry, which might lead to her distancing herself from Minato. This event could also change the way Naruto views his family's past and his parents' relationship.
They might be quite surprised. Minato could be amused to see different interpretations of his heroic deeds. Kushina might be a bit shocked at some of the wild ideas about their family or Naruto. For example, she might not expect some of the out - of - character scenarios written in the fanfiction.
Minato and Kushina's reactions could be complex. Minato, as a former Hokage, might initially be a bit cautious about how the fanfiction portrays the ninja world and its values. However, he would soon appreciate the new perspectives. Kushina would be thrilled from the start. She would be eager to explore the various relationships that Naruto has in these fan - created stories. She might also be amused by some of the more out - there plotlines, like Naruto having some extraordinary new powers that she hadn't thought of. And both of them would probably feel a sense of connection to the fans through these fanfictions.
The implications would be huge. It would completely shatter the positive family image that the Naruto series usually portrays. Fans who love the relationship between Naruto and his parents would be very shocked and possibly offended.
On a more personal level, they could face internal guilt. As Naruto grows up and achieves great things on his own despite their neglect, Minato and Kushina may realize what they've missed out on. This realization could cause them a great deal of internal turmoil and regret for not being there for their son when he needed them.