In a 'kawaki kills naruto' fanfic, the story would likely take a very dark turn. The characters would be forced to reevaluate their relationships and loyalties. Sasuke, for example, would be deeply affected as Naruto was his closest friend. He might be torn between seeking revenge and trying to understand what drove Kawaki to such an act. The new generation of ninja, like Sarada and Mitsuki, would also be involved in the aftermath. They might be caught in the middle of the conflict between Boruto and Kawaki, trying to find a way to restore peace while dealing with their own feelings of loss and confusion.
It could also be related to a prophecy or a pre - determined fate in the fanfic's plot. There might be some kind of dark prophecy that says Kawaki has to kill Naruto to prevent a greater evil. Or perhaps Kawaki is being controlled by an external force that has a vendetta against Naruto and uses Kawaki as a tool to carry out the murder.
Many of Naruto's friends and allies would be filled with rage. Characters like Sasuke would probably seek immediate revenge on Kawaki. The other villages might also see this as a sign of instability in the Hidden Leaf and could either try to take advantage or offer help depending on their relationships with the Leaf. And the younger generation, like Boruto, would be deeply affected. He would have to deal with the loss of his father and might struggle with his own identity and purpose in a world without Naruto.
The story would likely take a very dark turn. Team 7 would probably be hunted by the village. They would become outcasts and have to constantly be on the run. Their relationships with other characters would be completely shattered.
In such a fanfiction, perhaps Kawaki is driven by some extreme ideology. Maybe he believes Naruto's way of peace is a weakness and decides to take him out to change the ninja world in a more radical way.
Well, Sasuke would probably be consumed by guilt. He might go on a self - imposed exile or a journey to avenge Naruto. The other characters would start to reevaluate their relationships with Sasuke. Konoha might be in a state of mourning, and there could be a power vacuum. Some might blame Sasuke for Naruto's death, which would add more conflict to the story.
Naruto could develop a sense of guilt and isolation. Since Itachi was a well - known figure, Naruto might face criticism or be shunned by some for killing him. This would force him to re - evaluate his relationships and his place in the ninja world. He might have to struggle to prove that his actions were for the greater good and find new allies who understand his motives.
It would depend on the writer's intention. If the focus is on Naruto's growth, he could start exploring new jutsu or forms of chakra control. Since he was revived by Madara, there might be some dark elements associated with his revival that he has to overcome. Maybe he has to fight off some sort of curse that came with the revival process. And he would have to do this while still trying to protect the people he cares about.
After the proposal, they would probably start preparing for their wedding. Ino would be very involved in the planning, choosing the perfect flowers and dress. Naruto would be more focused on making sure all their friends are invited. Their friends would also be excited, and some might even offer to help with the preparations.
Perhaps Naruto's departure would lead to Rias trying to win him back. She could send her servants or allies to find Naruto and try to convince him to return. This would create a series of adventures as Naruto tries to avoid being found while also dealing with his own problems.
Sasuke's development would be complex. He might start to question his entire ideology that led him to kill Naruto. He could become more empathetic towards others as a result of his regret, realizing the value of life that Naruto always represented. He might also try to make amends in the ninja world, but it would be a long and difficult journey as he has to deal with his own guilt.