One possible storyline could be Naruto's struggle to adapt to his new physical state. He might have to relearn all his ninja techniques, now that he's missing an arm. For example, he'd have to find new ways to perform his signature Rasengan. Another could be his journey of self - acceptance, dealing with feelings of inadequacy compared to his former self. He could also face challenges from enemies who see his injury as a weakness and try to take advantage of it.
Perhaps a story could focus on Naruto's role - model status being affected. Younger ninjas might look at him differently now that he's missing an arm. Naruto could then strive to prove that his strength doesn't come just from his physical abilities. He could start teaching the next generation about the importance of mental and emotional strength, using his own situation as an example.
A storyline might involve Naruto exploring prosthetic options. In the Naruto universe, there could be some sort of ninja - tech prosthetic that he tries to master. This could lead to him training with new mentors who are experts in that area. Also, it could show how his relationships change. His friends might be overly protective at first, but Naruto would have to assert his independence and show that he can still be a great ninja even without his right arm.
Well, in some 'naruto loses arm fanfiction', it might be a result of a forbidden jutsu gone wrong. Naruto might be exploring a new and dangerous form of power, and the price is his arm. This would then set off a chain of events where he has to find a way to either get his arm back or adapt. He could also face discrimination from some in the ninja community who see him as weakened, but he'd prove them wrong by his unwavering spirit.
His combat abilities are severely affected. Naruto is known for his physical combat skills combined with his chakra - based attacks. Without his right arm, his punches and grappling moves are limited. He can't hold his kunai or shuriken as effectively in combat, which reduces his ranged attack options.
One possible storyline could be Percy's journey of learning to adapt to life with one arm. He might struggle at first with simple tasks like getting dressed or holding a weapon. Another could be him facing his enemies who now see him as weakened due to the loss of his arm, but he proves them wrong with his newfound determination and creative combat techniques.
One possible consequence could be a significant change in his fighting style. He might have to rely more on his left side and develop new jutsu techniques that can be executed with one arm. For example, he could focus on enhancing his Rasengan further to compensate for the loss of his right arm's abilities.
One possible fanfiction could be about Naruto's right arm gaining a new and mysterious power. Maybe it starts to glow with an unknown chakra, and he has to figure out how to control it without losing himself. It could be a power that has a connection to an ancient ninja clan's secret technique.
Perhaps in the fanfic, Naruto loses his arm due to a curse or a forbidden jutsu gone wrong. His friends, like Sasuke, then try to find a way to either get him a new arm or help him come to terms with the loss. It could also show Naruto's journey to adapt to his new disability and still be a great ninja, inspiring the younger generation in the process.
Maybe he was protecting someone in Wave. He's always the self - sacrificing type, so he could have put himself in harm's way to save a villager or a friend.
One storyline could be that Naruto gets the prosthetic arm after a particularly tough battle where he loses his original arm. He then has to learn to fight all over again, and this time, he combines his old skills with new ones enabled by the prosthetic. For example, the prosthetic arm could have special compartments to store kunai or other tools.
Another possibility is that Naruto and Yang have a special bond. This bond could be formed through shared experiences, like they both went through a difficult training together or survived a life - threatening situation. Because of this special connection, Naruto feels indebted to Yang or simply values Yang's life more than his own arm.
Another scenario might be that Naruto sacrifices his arm to save someone he cares about deeply. He might have used his arm to block a fatal attack aimed at a friend or a loved one, showing his selfless nature even in a fan - created story.