One interesting aspect could be the exploration of a darker side of Naruto's character. Maybe in the fanfiction, Naruto has faced some extreme hardships that led him to this darker path. For Kushina, it might involve her relationship with a dark Naruto in a way that is different from the original story. For example, she could be trying to save him from the darkness.
Some stories in this fanfiction might focus on the consequences of Naruto being dark on the entire ninja world. Kushina could be brought back in some way, perhaps through a jutsu or a special plot device. She then has to deal with a Naruto who is not the same as the son she knew. This could lead to a complex exploration of family, love, and the struggle between good and evil.
Perhaps they are living in a parallel universe where everything is dark and gloomy. Dark Naruto and Dark Kushina could be trying to find a way to break through to the normal universe. They might encounter strange versions of their friends and foes, and have to battle their own inner demons along the way. For example, Dark Naruto might struggle with the darker aspects of the Nine - Tails' power that he has fully embraced in this universe.
One interesting plot could be that 'dark kushina' initially tries to manipulate Naruto for her own goals but gradually develops real feelings for him as she gets to know him better. Another could be that they are forced to work together to save the Hidden Leaf Village from a powerful enemy.
Perhaps the Dark Puppeteer creates illusions based on Kushina to trick Naruto. Naruto, being strong - willed, has to break through these illusions by delving deeper into his memories of his mother. He could then use the love and strength he got from Kushina to defeat the Dark Puppeteer.
One interesting aspect could be the exploration of alternative personalities for Kushina. It might show a side of her that is more complex and less seen in the original story. For example, a darker side could involve her having different moral compasses or more intense and less positive emotions.
In 'kushina trains naruto fanfiction', it could show Kushina training Naruto in chakra control. She might use her own experiences as a jinchuriki to help him better manage the Nine - Tails' chakra. This could involve some special training exercises like meditating near the waterfall where the chakra flow is strong, which would help Naruto become more proficient in using his chakra and prevent him from going out of control when using the Nine - Tails' power.
One interesting fanfiction could be about Kushina's untold adventures before Naruto was born. Maybe she had some secret missions that involved protecting a powerful artifact. Another could be a story where Kushina gets to train Naruto in some special and unique jutsu that only she knew. And there might be a fanfic where Kushina interacts with characters from other villages in a way that changes the whole Naruto storyline.
One common plot is Kushina finding Naruto in a different time or dimension. For example, she might end up in the future where Naruto has grown up and she gets to see the kind of person he has become. It's an emotional and interesting concept as she gets to witness all his achievements and the challenges he has overcome.
It could develop in a complex way. Maybe at first, Kushina is shocked by Naruto's dark transformation. But as a mother, she tries to understand him. She might start by reaching out to him, trying to find the root of his darkness.
There are Naruto dark fanfictions that explore the backstories of the villains in a more in - depth and dark way. For example, Orochimaru's experiments could be delved into even further, showing the true horror of what he was doing in a way that the original series only hinted at. Also, some fanfictions might have a dark alternate version of the Chunin Exams, where the tests are rigged to cause maximum harm and chaos among the genin.
One interesting dark Naruto fanfiction could be about Naruto being possessed by an ancient evil spirit. This changes his personality completely, making him more ruthless and power - hungry. He starts to use his new - found dark powers to take over the Hidden Leaf Village, believing it's the only way to bring true order.