If Minato and Kushina were alive in Naruto's story, Naruto would have grown up with his parents. He wouldn't have had to endure the loneliness he did as a child. Minato could have trained Naruto from a young age, passing on his powerful jutsu. Kushina could have taught Naruto about the Uzumaki clan's secrets. Also, the village of Konoha would have been a different place, with Minato's leadership and Kushina's strength adding to its security.
Well, one big difference would be Naruto's character development. With his parents alive, he might not be as hungry for recognition. He'd have a loving family environment which could make him more confident in a different way. In terms of the plot, the Nine - Tails' story would be different. Minato and Kushina could have better controlled the Nine - Tails' power within Naruto, and perhaps there wouldn't be the same threat from Akatsuki regarding the tailed beasts.
It could completely change the dynamics of the Naruto universe. Their presence might have prevented many tragedies and shaped Naruto's life differently.
One idea could be that Naruto grows up with his parents in a world where the Nine - Tailed Fox attack never fully happened. Minato and Kushina could train Naruto from a young age, passing on their unique jutsu and wisdom. Maybe Naruto would be less of an outcast and more of a confident shinobi early on.
The relationship would be very different. Instead of being an orphan, Naruto would have his parents around for all the important moments in his life. Minato could teach him about being a Hokage from an early age, and Kushina could give him the motherly love and advice. There would be a strong family bond. Naruto would be more confident in his abilities because he has his father, a great ninja, to guide him. And he would have a more stable emotional state with his mother's care.
It could start with Naruto being born and Minato and Kushina getting to raise him. They would teach him all about chakra control and ninjutsu. Naruto would be a happy kid growing up in a loving family environment.
The emotional bond would be stronger. Naruto wouldn't have to face the pain of growing up without a father. Minato could be there to cheer him on during his training and be a source of comfort when Naruto faced difficulties, like when he was bullied as a child. He could also help Naruto better control the Nine - Tails' power from the start.
Well, in certain fanfictions, their relationship could be more of a slow - burn type. Maybe they start off as just friends or comrades who gradually realize their feelings for each other over time. This would give more depth to their characters and how they interact with each other.
One possible storyline could be that Naruto grows up with a strong sense of family. He would be trained by Minato from a young age, learning advanced jutsu much earlier. With Kushina's loving care, he might not have the same insecurities. For example, he could be more confident in school and among his peers. He might also have a closer relationship with the Uzumaki clan, as Kushina would surely teach him about their heritage.
Well, Minato could start training Naruto from a very young age. He could pass on his Flying Thunder God Technique, which would give Naruto a huge advantage in combat. Kushina could train Naruto in the ways of the Uzumaki clan, like their strong chakra reserves and sealing techniques. With both of them alive, Naruto's training would be more comprehensive and personalized compared to what he had in the original story.
In many Naruto fanfictions where Naruto meets Kushina and Minato, it often creates a very emotional scenario. Naruto finally gets to meet his parents who he has only heard about. It could be a heart - warming reunion where they share stories, hugs, and Minato and Kushina get to see how far Naruto has come.
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.