Sasuke could also be involved. His sharingan and his quest for power might lead him to study the chakra chains. In fanfiction, he could either try to steal the power of the chakra chains for himself or work with someone who has them to defeat a common foe. His dark and brooding nature could add an interesting dynamic to stories involving the chakra chains.
Naruto himself can be a central character in such fanfictions. Given his own vast chakra reserves and his ability to learn new techniques quickly, he could be the one to unlock the true potential of the chakra chains. He might use them in a battle against a powerful new enemy, perhaps one that is immune to his regular jutsu but vulnerable to the unique properties of the chakra chains.
Sasuke might also be a main character in such fanfiction. His Sharingan and his own strong chakra could potentially be used in relation to the chakra arrow. He could use his Sharingan to predict the path of the chakra arrow or enhance its power.
Sasuke is often a character associated with black chakra in fanfiction. Given his natural inclination towards power and his dark past, it's easy to imagine him being connected to such a powerful and mysterious form of chakra.
Often, Naruto himself might be associated with it. Since he has a large amount of chakra and is always looking for new ways to fight, the chakra bow could be something he discovers or is given. Another character could be Sasuke. His Sharingan might give him a unique advantage in using the chakra bow, like being able to accurately aim at distant targets.
Sasuke can also be a central figure. His quest for power in the original Naruto makes him a prime candidate in fanfictions about godlike chakra. He might either gain it on his own or be in a rivalry with Naruto over it, leading to intense battles and power struggles.
Another character could be a long - lost relative of Kushina. This character might show up in the fanfic with an even deeper understanding of the adamantine chains. They could come to the Hidden Leaf Village to teach Naruto or other young ninja about the true nature and power of the chains, which could lead to all sorts of new adventures and battles.
In Naruto fanfiction, chakra chains are often given the ability to extend over long distances. This allows the user to reach far - off enemies or objects. They can also be made to be very strong, so strong that they can break through solid objects like rocks or even some basic ninjutsu barriers. Additionally, some fanfictions give the chakra chains the ability to change shape, for example, into sharp spikes to attack the enemy more effectively.
Sasuke is often a popular character in Naruto chakra blades fanfiction. His natural affinity for chakra and his combat skills make him a great candidate for wielding powerful chakra blades. Naruto could also be popular in this context, as he might discover or be given chakra blades and use his unique chakra reserves and abilities in combination with them. Kakashi is another one. With his Sharingan and his experience, he could potentially have some interesting interactions with chakra blades in fanfiction.
In many fanfictions, the Rinnegan and chakra chains are often intertwined in terms of power and function. The Rinnegan, being one of the most powerful ocular abilities in the Naruto universe, can potentially bestow special properties on the chakra chains. The chakra chains themselves might be a way to channel the raw power of the Rinnegan. For instance, they could be used to bind opponents while simultaneously draining their chakra through the Rinnegan's absorptive capabilities. This connection adds an interesting dynamic to the characters who possess both the Rinnegan and the ability to use chakra chains, making for some really cool and unique battle scenarios in fanfiction.
It really depends on the specific fanfic. But it could be Naruto himself, as he often has new abilities or storylines in fanfics. He might be the one to master the chakra chains in a unique way.
Kisame Hoshigaki is often associated with it. Given his shark - like appearance and his use of the Samehada, which is a large and unique sword, he could be easily incorporated into fanfiction involving the 8 Sword Style. His brute strength and combat skills would make for an interesting take on how he might adapt to or already be related to the 8 Sword Style.