One interesting plot could be that Naruto discovers a hidden power within Kisame's sword. Maybe during a battle, the sword starts to react to Naruto's chakra in an unexpected way, leading to a new form of combat for Naruto.
A plot idea could involve a quest where Naruto has to retrieve Kisame's sword for some important reason. Along the way, he uncovers secrets about the sword's origin and its connection to an ancient ninja clan. This could also involve him facing off against those who want the sword for their own malicious purposes.
Well, a plot could involve Kisame's sister being a healer. Naruto gets seriously injured in a battle and she is the only one who can save him. As she heals him, they start to share their stories and dreams. This leads to her realizing that the Akatsuki's ways might not be right. Also, she could be in a love triangle between Naruto and a member of the Akatsuki, which would add a lot of drama to the story. There could also be a plot where she discovers a prophecy that Naruto is the key to saving the ninja world, and she decides to protect him at all costs.
Another plot could revolve around Itachi and Kisame having a philosophical debate during a long journey. Since Itachi has his own complex moral code and Kisame is more straightforward in his loyalty to the Akatsuki, they could discuss the meaning of loyalty, power, and the end goals of their organization. This could lead to a deeper understanding between them or even a rift, depending on how the story unfolds.
Well, in some fanfictions, Naruto might defeat Kisame in a battle and take the sword as a trophy. Maybe he uses his newfound Sage Mode powers or some other advanced jutsu to overpower Kisame and claim the sword.
A really interesting plot could be a time - travel fanfiction. Suppose Sakura somehow travels back in time and meets a younger Kisame. She tries to change his path, knowing the future he will have. This could involve a lot of complex character development as Sakura has to deal with the differences in their values and the knowledge she has of his future actions.
One plot idea could be that Naruto discovers an ancient scroll that reveals the secrets of the Benihime Sword. He then embarks on a journey to master its powers, facing various challenges along the way, like battling rogue ninja who also seek the sword's power.
One interesting plot could be Kisame and Naruto teaming up accidentally during a mission against a common enemy. They start off distrusting each other but gradually learn to respect each other's skills.
Maybe the Raijin Sword is actually a key to an ancient realm. The story could follow Naruto as he embarks on a journey to this realm, facing many challenges along the way, all related to the secrets of the Raijin Sword.
Well, in some naruto chakra sword fanfiction, the sword might be a key to an ancient power. For example, it could unlock a hidden form of chakra control that only the sword's wielder can access. Or perhaps the sword has a connection to a long - lost clan, and by using it, the main character uncovers secrets about their heritage and new jutsu related to the sword.
Perhaps the Yamato sword was once owned by an ancient Uzumaki clan member. Naruto, being an Uzumaki, has a natural affinity for it. In the fanfiction, he could learn ancient techniques related to the sword from hidden scrolls left by his ancestors, and use these new skills to protect the village from a new and powerful threat.
Perhaps in the fanfiction, the Black Lightning Sword was created by a long - forgotten clan. The main character, who is an outcast in his village, stumbles upon the sword. With it, he begins to train and master the black lightning powers, all while trying to prove his worth to the village that once shunned him. He could also form an unlikely alliance with a former enemy because of the sword's existence.