It might change his fighting style significantly. Instead of relying solely on his ninjutsu and taijutsu, he would now incorporate swordsmanship. This would require him to train in a different way and develop new skills. Also, the sword could give him an edge in battles, allowing him to defeat opponents he previously couldn't. For instance, against opponents with strong defenses that his normal attacks couldn't penetrate, the sword could be the key.
The powerful sword could change Naruto on a deeper level too. It could be a symbol of his growth and new responsibilities. As he wields the sword, he might become more of a leader figure. His friends would look up to him in a different way, and he would have to live up to the expectations that come with such a powerful weapon. He may also attract more attention from powerful enemies who see him as a greater threat now that he has the sword, which would force him to constantly improve and adapt.
A sentient sword can change the Naruto story in many ways. For instance, it can act as a mentor to Naruto. Since it has its own knowledge and experiences, it can guide Naruto in his training and in battles. This gives Naruto an edge over his opponents as he has the wisdom of the sword at his disposal.
Well, in some fanfictions, he might inherit it from an unknown ninja clan. Maybe his parents left it for him and it was hidden until he discovers his true heritage.
Having a sword would likely make Naruto's fighting style more versatile. He could use it for defense as well as offense. Maybe he would learn new jutsus that are specifically designed to enhance the power of the sword, like infusing it with chakra to make it cut through stronger defenses. This would also change his strategic approach in battles, as he now has a melee weapon at his disposal.
If Naruto has the Raijin Sword in the fanfiction, his combat abilities would be revolutionized. The sword itself is a powerful weapon. Naruto could use it to cut through tough defenses that his normal attacks might not be able to penetrate. For example, some enemies might have barriers made of earth or water - based chakra. With the Raijin Sword, Naruto could slash through them with ease. Moreover, the sword could potentially be combined with his Sage Mode or his Jinchuriki powers. He could infuse the sword with his own chakra, such as the Nine - Tails' chakra, to create even more devastating attacks. This would make him a much more formidable opponent in battles.
The symbiote can change Naruto's physical appearance. For example, it might give him a more menacing look with some black markings similar to traditional symbiote looks in other stories. This can also affect how others perceive him, making some fear or be more cautious around him.
The Yamato sword could add a slashing and stabbing element to Naruto's fighting style. Instead of just relying on his punches and Rasengan, he can now make quick and precise strikes with the sword, catching his enemies off - guard.
Well, it could make Naruto's fighting style more aggressive and direct. With Zabuza's sword, Naruto might incorporate more slashing and close - combat moves. He could use his shadow clones more effectively in combination with the sword, like having clones surround the enemy and then attacking from different angles with the sword.
His relationship with Sasuke could be affected. Sasuke might be intrigued or even jealous of Naruto's new weapon. This could lead to new rivalries or, on the other hand, a new level of respect between them.
Well, sometimes in fanfiction, Naruto changes his attitude when he discovers a new power within himself. Realizing that this power comes with great responsibility, he could become more solemn and focused. He might start to view his friends and enemies in a different light, perhaps seeing the potential for good in his foes and being more cautious about involving his friends in dangerous situations.
Naruto could develop a new sense of determination. He might be determined to not let Orochimaru's experiments define him. Instead, he could use what has happened as a motivation to become stronger in his own way. He may also start to study more about the type of experiments Orochimaru was doing, not to replicate them, but to find ways to counter any future threats related to that kind of science.