A storyline could be that the seal holding Kushina inside Naruto starts to weaken for some reason. As a result, Naruto has to deal with the emerging consciousness of Kushina while also trying to keep it a secret from his friends. This internal struggle could lead to some interesting character development and new plot twists.
There could be a fanfiction storyline where Kushina's sealed presence in Naruto is discovered by an enemy. The enemy then tries to manipulate this situation to their advantage. Naruto has to figure out how to protect Kushina's essence within him while also fending off the enemy. This could involve him delving deeper into his own chakra and the secrets of the seal, leading to new power - ups and alliances.
In certain fanfictions, Kushina being sealed in Naruto could be related to a prophecy. It might be seen as a way to ensure Naruto's growth and development into a powerful shinobi. The sealing could be a means of giving him an edge, like an extra boost of chakra or some special abilities that are unique to Kushina. It could also be a way to connect Naruto more deeply with his Uzumaki heritage.
A possible storyline might involve Naruto and Kushina having to navigate the challenges of raising a family while also being important figures in the ninja world. They would need to balance their duties as parents with their responsibilities to their villages. There could also be a story where they face a crisis within their relationship, like a misunderstanding or an outside influence trying to break them apart, and they have to work through it to keep their family intact. Additionally, they could be involved in diplomatic missions together as a married couple, representing the Uzumaki and their respective villages.
In a fanfiction where Kushina survives, she could play a crucial role in preventing the Uchiha massacre. Given her strong will and connection to the village, she might be able to mediate between the Uchiha clan and the village leadership. This could lead to a very different future for Sasuke and Itachi as well, with the Uchiha clan remaining a part of Konoha and not turning against it.
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.
Perhaps Kushina is a powerful ninja from another village who comes to Konoha on a diplomatic mission. Naruto, being curious and always looking for new challenges, gets involved with her. They end up on a journey together to solve a mystery that threatens both of their villages. Or, Kushina could be a trainer in a secret ninja academy where Naruto is sent for special training and they form a bond over his training progress.
Maybe a story where they both find themselves in a dangerous situation outside of their respective villages. They have to rely on each other's skills and powers to survive, and in the process, a deep friendship or more could develop. For example, they could be trapped in a mysterious and dangerous forest filled with powerful beasts.
In fanfiction, when Kushina is sealed in Naruto, it can change his relationship with the Uzumaki clan. He might have a deeper connection to his heritage and be able to access Uzumaki - specific techniques more easily. Also, it could influence his relationships with other characters. If Kushina's memories are sealed within him, he might have insights into past events that others don't, which could lead to different interactions with characters like Minato or the other villagers who knew Kushina.
One possibility in such a fanfiction scenario is that Kushina's own chakra, which was already special as an Uzumaki, could have an impact on Naruto while he's sealed within her. It could either strengthen him in some ways or cause unforeseen consequences. Also, characters like Minato would have a different relationship with the situation. Instead of seeing Naruto as his son on the outside, he might be more focused on the presence of Naruto within Kushina, which could change how he approaches protecting his family and the village.
Well, perhaps in the 'naruto abused by kushina fanfic', it could start with Kushina having a premonition of Naruto causing great harm in the future. So, in her attempt to prevent that, she goes overboard and starts abusing him. Or it could be due to some long - hidden family secret that makes her act out against Naruto, thinking she's doing the right thing for the family or the village in the long run.
In some fanfictions, Kushina could be sealed in Naruto during a moment of great sacrifice. For example, if Naruto was in a near - death situation, Kushina's spirit might choose to merge with him, sealing herself within him to save his life. Or perhaps there was a dark magic user who tried to steal Kushina's power, but instead of losing it, she managed to redirect it into Naruto through a self - imposed seal.