Well, if Naruto were trained by Kisame in a fanfiction, Naruto's physical strength and endurance could potentially improve a great deal. Kisame is known for his tough training methods. Also, Naruto might start to understand the Akatsuki's motives more deeply, which could lead to some internal conflicts within himself. He may also develop new forms of Rasengan that incorporate water elements from Kisame's teachings, making his attacks even more diverse and unpredictable.
Naruto's character could change in several ways if trained by Kisame in fanfiction. Firstly, his confidence might take on a different form. Instead of the boisterous and sometimes over - the - top confidence he has, it could become a more subdued and internalized self - assurance. His relationships with his friends in Konoha might also be affected. He might feel a bit of an outsider now that he has been trained by an enemy. Emotionally, he could become more guarded, as Kisame is not one to show much emotion. And in terms of his fighting style, he might adopt a more stealthy and patient approach, which is very different from his usual in - your - face style.
One possible plot for a 'naruto trained by kisame fanfic' is that Naruto is sent on a secret mission where he has to infiltrate an enemy base that is heavily guarded with water - based defenses. In order to succeed, he seeks out Kisame, who is an expert in water - style and stealth. Kisame trains Naruto not only in water - style jutsu but also in how to move silently in water, how to sense enemies through water vibrations, and how to use water as a cover. This training would enhance Naruto's skills and make him a more versatile shinobi, able to handle different types of combat situations.
Naruto's character might become more calculating. Kisame is a very strategic fighter, and Naruto could pick up on this trait. He would start to think more before acting in battles.
There could be. Fanfiction is a vast realm where all sorts of ideas are explored. However, I'm not sure if there is a highly popular or mainstream 'naruto is kisame apprentice' fanfiction. It might be a more niche concept, but it's entirely possible that some creative writer has delved into this idea to create an interesting story about Naruto learning from Kisame, perhaps incorporating Kisame's unique fighting style and view of the ninja world into Naruto's growth.
Iruka could be an important character. He's always been like a father figure to Naruto, and now with this new revelation, he might have to help Naruto deal with it. Hinata could also be in the story, and her feelings for Naruto could be complicated by his connection to Kisame. And then there could be some original characters created just for this fanfiction, like a ninja who was a former ally of Kisame and has some information for Naruto.
Kisame would probably be very angry at first. Samehada is his weapon and has been with him for a long time. He might feel betrayed and try to get Samehada back by force.
One idea could be a story where Naruto and Kisame are forced to team up during a mission that has a greater threat to the ninja world. They start off distrusting each other but gradually come to respect one another's skills.
At first, it would be full of suspicion. Naruto is a Konoha ninja and Kisame is from the Akatsuki. But as the teaching progresses, they might develop a mutual respect. Naruto would respect Kisame's power and knowledge, and Kisame might respect Naruto's determination.
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.