The overall plot of the Naruto story would take a wild turn. Instead of just focusing on ninja politics and the search for power within the ninja world, Naruto would now be involved in a much larger, more complex situation. He would have to deal with the implications of having items from another universe. There could be new villains emerging who are interested in the Millennium Items specifically, and Naruto would have to defend not only his village but also these powerful artifacts. This could lead to a whole new genre - mixing of the Naruto world with elements from the Yu - Gi - Oh! world, creating a truly unique and engaging fanfiction.
Naruto would probably be both excited and cautious. He's always eager for new power to protect his village and friends, but he also knows that power can be dangerous. So, he'd likely start by trying to understand the items' powers slowly. He might test them out in a controlled environment at first.
The Naruto Millennium Items fanfictions can change the characters' personalities. When a character is influenced by the power of a Millennium Item, they might become more power - hungry or more protective. Take Sakura, for example. If she were to be associated with a Millennium Item, she might become more confident in her abilities but also more cautious about the power she wields. This alters the way she interacts with other characters and the overall Naruto universe.
If Naruto had 3 siblings, his loneliness as a child would have been much less. He would have had a support system from the start. His siblings could have helped him train, so he might have become stronger faster. For example, they could have sparred with him regularly. Also, in the story, when facing challenges like the Akatsuki, his siblings could have joined forces with him, making the battles more balanced and potentially having different outcomes.
One possibility could be that Naruto uses the Millennium Items to gain new powers. For example, if he had the Millennium Puzzle, he might unlock hidden knowledge or abilities related to chakra manipulation. Maybe it could even help him understand and control the Nine - Tails better.
His battles would be less life - threatening. He could take more risks without fearing death, which might make him bolder in combat.
He might have different fighting styles. Instead of relying solely on his regular jutsu, he could use Zetsu - like abilities, like camouflaging himself. His appearance might also change slightly, with some Zetsu - like features. This could lead to his friends and enemies having different reactions to him.
His relationships with his friends might change a bit. His friends would be both amazed and maybe a little bit intimidated by his new powers. For example, Sasuke might see Naruto as an even greater rival now. And his relationship with his sensei, like Kakashi, would also be different as Kakashi would have to help Naruto understand and control these new alien powers.
Naruto might become more cautious. Guns are very different from ninja tools, and one wrong move could be fatal. So he'd have to think twice before acting impulsively, which is a big change from his usual head - first approach.
One interesting Naruto Millennium Items fanfiction could be 'The Shinobi and the Millennium Puzzle'. In this story, Naruto somehow gets his hands on the Millennium Puzzle and it starts to affect his chakra in strange ways. It combines the magic of the Millennium Items with the ninja world really well.
If Naruto had fire fist powers in fanfiction, his combat style would be completely different. He could use the fire fists for both close - range attacks and long - range by shooting out fire projectiles. This would make him a more versatile fighter.