In some fanfictions, Naruto might learn it through special training from a mysterious master.
Sometimes, Naruto acquires the ability to create strings when he unlocks a hidden power within himself during a critical moment in the story.
Well, it could be that Naruto discovers an ancient scroll that contains the secrets of creating strings and studies it intensively to master the skill.
In some fanfictions, Naruto might use chakra strings in a similar way to how Sasuke uses his chakra to control his sword. He could send out his chakra in the form of strings to manipulate objects from a distance. For example, he could use them to pull weapons out of an enemy's hand or to tie up an opponent.
Some fanfictions depict the chakra strings as having a connection to Naruto's emotions. When he's angry, the strings become more intense and powerful. It's a way to show his growth and how his chakra is evolving. This can lead to some really interesting battle scenes where he's not just using brute force but also his emotional state to control the strings.
Well, it could be related to some sort of power - up or inheritance in the fanfiction world. Maybe Naruto discovers a hidden bloodline trait that not only gives him new abilities but also enhances his learning capacity. So he can quickly grasp new jutsus and combat strategies.
In some fanfictions, Naruto might learn Rasengan through the guidance of an alternative mentor. Maybe a powerful shinobi from another village takes him under their wing and shows him different techniques to master the Rasengan. This could add a whole new dynamic to the story and his character development.
Naruto could create an organization based on his ideals of peace and understanding. First, he'd identify the problems in the ninja world that need solving, like the lingering hatred between clans. Then, he'd look for people who are also passionate about change. He might set up a training facility within the organization to teach new ninjutsu techniques that promote cooperation rather than just combat skills.
Well, in some Naruto fanfictions, Naruto might use his chakra in an innovative way. He could potentially infuse his chakra into raw materials and shape them into the form of a sniper rifle. Maybe he draws inspiration from the precise control he has in his Rasengan technique to craft the complex parts of the rifle with high precision.
Well, Naruto being godlike in the fanfiction probably has the power to inspire people from all over to come and help build the village. He might use his incredible speed and strength to construct buildings quickly. Also, his shadow clones could be used to multitask, like one clone could be in charge of planning the layout while others are gathering resources.
In many fanfictions, Naruto might have a special mentor or encounter a unique training situation that leads him to master the use of the sword.
In some fanfictions, Naruto might learn this through some magical or spiritual means. But it really depends on the author's imagination.
Chakra strings can be used to create elaborate traps. For instance, Naruto could spread his chakra strings all around a battlefield and when the enemy steps on them, they get tangled up. This would be a unique way to immobilize opponents without direct combat.