Another way is through a complex web of events that are out of his control. For instance, in a fanfiction where there is a prophecy that one of the two main characters (Naruto or Sasuke) must die to save the world from destruction. Sasuke might be the one chosen by fate, and the writer could use this to explore themes of destiny and free will. His death then becomes a crucial part of the overall story's message about sacrifice and the greater good.
Some writers justify it by creating a situation where Sasuke has to make a great sacrifice. For example, he might give his life to protect Naruto or the Hidden Leaf Village from an overwhelming threat. His selfless act in these scenarios is seen as a way to atone for his past mistakes and show his growth as a character.
In other fanfictions, Sasuke's death could be a result of the consequences of his own actions. If he delved too deep into dark powers or made an enemy that was far too powerful for him to handle, his death would be a natural outcome. Writers might use this to show the dangers of power - seeking and the price one can pay for going too far. This also allows for exploration of how the other characters react to his downfall due to his own choices.
Fanfiction writers could use power imbalances. If Naruto has suddenly gained a lot of power and doesn't fully control it, he could accidentally hurt Sasuke. It shows the consequences of power and the need for control in their relationship.
Some writers justify Lucy's death by making it a noble sacrifice. For example, she might give up her life to close a portal that would otherwise release a great evil upon the world. This way, her death is seen as necessary for the greater good of the entire Fairy Tail universe, including all the kingdoms and innocent people in it.
Another way is through a series of tragic events. If Naruto experiences multiple losses, such as the death of his closest friends or mentors, he could become disillusioned with the world. Writers can show how this grief and anger transform him into a corrupted version of himself, as he starts to question the values he once held dear.
Well, often they use the idea of Naruto's strong will. They say that his will is so strong that it breaks the normal limits of what is possible in the Naruto universe. So, his will allows him to access these impossible powers. Also, in some fanfictions, Naruto goes through some extreme and unique training or experiences that no one else has had, and this is what gives him these extraordinary abilities. For example, he might travel to a different dimension where the laws of physics and chakra are different, and when he comes back, he has these new powers.
They might justify it through her past traumas. For instance, if Sakura has faced repeated rejections or has been constantly overshadowed in the original story, a writer could use this as a reason for her to betray. She could feel that she has been treated unfairly and that her so - called friends never really understood her pain. So, in the fanfiction, she decides to take a different path that is seen as a betrayal to those around her.
Well, Naruto's death would likely shatter Sasuke. He has always had Naruto as a sort of anchor, whether he admitted it or not. His whole life has been intertwined with Naruto's. Naruto's death might make Sasuke question his entire purpose. He could initially be filled with rage and a thirst for revenge, thinking that he could have prevented it. This could lead him down a darker path at first. But eventually, it might also make him realize the importance of Naruto's ideals and he could strive to carry them on in Naruto's memory.
One possible reason could be that he overestimated his abilities during a battle in the Wave arc. Maybe he took on an enemy that was much stronger than he thought and got fatally injured. Another reason could be that he sacrificed himself to save Naruto or someone else. It's also possible that there was some sort of betrayal within the group they were with, and Sasuke was caught off - guard and killed.
They could also use the idea of being influenced by dark powers. Maybe Naruto comes into contact with a powerful and malevolent force that slowly corrupts him, making him do things that are out of character for the original Naruto. This gives the writer a way to explore a different side of the character while still having a somewhat believable reason for his actions.
Well, if Sasuke dies in this fanfiction set in the Wave arc, Naruto would likely become more determined to avenge him. He might also grow more solemn and focused on his ninja training, realizing the fragility of life. His view of the world could shift from being a bit more carefree to a darker, more serious one as he grapples with the loss of his friend and rival.
One possible 'naruto sasuke death fanfiction' could be where they die in a final battle against an extremely powerful new enemy that neither of their powers could overcome. This new foe has abilities that nullify their jutsu and in a heroic but tragic attempt to defeat it, they sacrifice themselves.