Iruka - sensei could be one of those who help Naruto. He has always been like a father figure to Naruto and would offer emotional support. Rock Lee could also be a great helper. Lee, who has trained his body to be extremely powerful, could teach Naruto some physical combat techniques that don't rely on eyesight. And of course, the Nine - Tails inside Naruto might also play a role. It could potentially share some of its power or knowledge to help Naruto deal with his new situation.
After losing his eyesight, Naruto's life changes drastically. He would face difficulties in his daily life too, not just in combat. Simple things like getting around in Konoha would become a challenge. He might have to rely on friends like Sakura or Kakashi more often. In terms of his ninja career, he could start to focus more on internal chakra control and develop new jutsus that don't require visual aiming. This could lead him on a new path of self - discovery and growth as a ninja.
It could be Danzo. He was always power - hungry and had his own ideas about what was best for the village. He might see Naruto as a threat and find a way to take away his birthright.
Sasuke could be one of the people who help him. Despite their past differences, they have a deep bond. Sasuke has his own skills and knowledge that could be useful in Naruto's situation, like his Sharingan abilities which could help in detecting enemies while Naruto is hiding his face.
I think Rock Lee would be there to help. His unwavering dedication would inspire the new villagers. And Hinata, with her kind heart, could help in creating a warm and inclusive community. Maybe even some of the older ninjas like Kakashi could offer their wisdom and experience.
Itachi might be involved. Even though he has his own complex backstory, in this fanfiction, his powerful abilities and knowledge could be used to try and stop Naruto from losing his humanity completely. And the yaoi aspect could come in as Itachi forms a deep, perhaps unorthodox bond with Naruto during this process. Another character could be Neji. He has always been somewhat of a rival and friend to Naruto. Here, he could be the one who is determined to bring Naruto back to his normal self, and a yaoi - themed relationship could potentially develop between them as Neji delves deeper into Naruto's situation.
Perhaps an unknown and powerful dark ninja. This ninja could be from a long - forgotten clan with dark powers. They might have a vendetta against the Leaf Village and see Naruto as the key to their revenge. So they use their dark arts to make Naruto lose his sanity and turn him against his own village.
His friends like Sakura, who is a medic - ninja, would surely be the first ones to try to help. She could use her medical knowledge and skills to diagnose Naruto's illness.
His friends, Hermione and Ron, would surely help. Hermione with her intelligence and Ron with his loyalty.
His friends from Konoha like Shikamaru and Choji could help. Shikamaru is smart and can come up with great strategies, while Choji can provide brute strength in battles.
His friends like Sasuke and Sakura might help. They have different skills that could be useful.