It really depends on the specific fanfiction. However, it could be the blind samurai themselves as a main character. They would be the focus of the story, with their journey and development being central. There might also be Naruto characters who interact with the blind samurai, like Naruto himself. Naruto's positive and determined attitude could contrast with the more reserved and perhaps wiser blind samurai.
Obviously Naruto is one of the main characters as the title 'naruto goes blind fanfiction' implies. His friends like Sasuke and Sakura are also likely to be main characters. They play important roles in Naruto's life, especially when he's dealing with his blindness. They could be his support system or even be part of the conflict in some cases.
Another main character could be Kakashi. As Naruto's teacher, he could play a crucial role in training Naruto to adapt to his blindness. He might use his own experiences and wisdom to help Naruto develop new skills and strategies for survival and combat in the ninja world.
Well, the little samurai himself is surely one of the main characters. He's the focus of the story, with his growth and adventures at the center.
One interesting idea could be the unique fighting style of the blind samurai. Since they can't rely on sight, they might have developed an extraordinary sense of hearing or other senses to detect opponents' movements, like how real - world blind martial artists do. Another idea could be the backstory of how the character became a blind samurai in the Naruto universe. Maybe it was due to a tragic battle or a special mission gone wrong.
Well, obviously the blind prodigy themselves is a key character. There could also be original characters created specifically for the fanfiction. For example, a rival who also has some sort of disability but uses it in a different way. Another potential character could be a healer who helps the blind prodigy learn to use their other senses better. And of course, existing Naruto characters like Naruto, Sasuke, Sakura, and Kakashi are likely to make appearances. They could interact with the blind prodigy in various ways, like Naruto being a source of motivation or Sasuke being a foil to the blind prodigy's more positive attitude.
Well, obviously Oh Samurai Girl herself is a main character. She's the one with the sword skills and the brave heart.
Obviously, the young samurai himself. He could be a young, headstrong boy with great potential in martial arts.
Often, characters who are hybrids of samurai and ninja traits are popular. For instance, a character who was born into a samurai clan but has an affinity for ninja techniques. They can bring a unique perspective to the story. Another popular type could be the wise old samurai master who imparts valuable knowledge to the younger generation, much like some of the respected ninja senseis in Naruto.
Sakura from Naruto could be an interesting addition in the crossovers. In a fanfiction, she could use her medical skills to help the injured in the Samurai Champloo world. And her strong - willed personality would interact in interesting ways with the characters like Mugen, who might initially underestimate her but later come to respect her.
It could be a rogue samurai who has turned against his own clan and wants to destroy all ninja - samurai relations. He might have a powerful sword that can nullify ninjutsu.