Well, in certain fanfictions where Kushina is sealed in Naruto, it changes a lot. Naruto may start to have memories or instincts related to Kushina. Regarding his abilities, it could be that he has an easier time controlling the Nine - Tails' chakra because of Kushina's connection to it. Also, he might develop new fighting styles inspired by Kushina's own combat techniques.
In some fanfictions, Kushina was sealed into Naruto through a complex jutsu. It might be a modified version of the sealing jutsu used to seal the Nine - Tails. The process could involve special incantations and chakra manipulations.
Well, it could have a huge impact. If Kushina hurts Naruto in the fanfiction, it might make Naruto more distrustful. He could become more withdrawn and have to work harder to build relationships later on.
This could have a profound impact on Naruto's character. Firstly, he might feel an added pressure to live up to Minato's legacy. Since Minato was highly respected, Naruto would strive to be as great. Also, Minato's presence could act as a guiding force, influencing Naruto's values and his approach to relationships. For example, Minato might offer advice on how to handle his friends better or how to deal with the village politics through their mental connection. This would lead to a more mature and well - rounded Naruto.
Naruto might feel abandoned at first. Since Kushina is his mother, her leaving could make him feel lonely and question why she has to go. He may become more withdrawn.
It could add to the popularity of certain types of fanfiction. If Kushina is seen as being obsessed with it, more fans might be interested in exploring the fanfictions she might be interested in. For example, if there are fanfictions that focus on Kushina's relationship with Naruto in new ways, those might gain more attention.
The lion bloodline in fanfiction can also influence a character's mental state. It could endow them with a fearless and dominant personality, which is often associated with lions. This can be useful in battles as they won't be easily intimidated by opponents. Moreover, it might give them an instinctual understanding of combat situations, much like how a lion instinctively hunts. They can quickly assess their enemies and come up with strategies on the fly.
If Minato and Kushina disown Naruto in fanfiction, Naruto's character might develop in a very different way. He may grow up with a sense of abandonment that shapes his entire personality. He could become extremely independent but also very lonely. His idea of family would be completely distorted. He might even start to view the concept of 'home' as something he doesn't have or need. This could also make him more empathetic towards other outcasts, as he himself has been cast out by his own parents.
It would likely have a huge impact. Naruto is already a complex character, but with Minato sealed inside him, he might gain access to some of Minato's memories or skills more directly. This could accelerate his growth as a ninja. He might also struggle with the idea of having his father so close yet so far, which could add a new layer of emotional depth to his character.
This kind of fanfiction can have a negative impact on the Naruto fandom. It can make many fans feel disgusted because it distorts the important family relationship. It may also lead to division within the fandom, with some fans who support this kind of extreme and unethical creativity and those who firmly oppose it.
It would likely have a huge impact. Naruto is known for his positive and determined nature. Having Madara sealed in him might introduce a struggle between his own beliefs and the dark and powerful influence of Madara. He may constantly have to fight against Madara's thoughts trying to overtake him, which could make him more cautious and perhaps a bit more jaded in his view of the ninja world.