Obviously Naruto would be one of the main characters. He is the central figure around whom the'seeing red' concept is likely based. There may also be his friends like Sasuke and Sakura, as they are often involved in Naruto's storylines and could be part of the events that make him see red.
In addition to Naruto, there might be new characters introduced in the 'naruto seeing red fanfic'. These could be antagonists who deliberately push Naruto's buttons and cause him to lose his temper. They might be powerful foes with their own motives that clash with Naruto's ideals.
It might focus on Naruto and an antagonist who is deeply entrenched in the darkness. This antagonist could be a new character or an existing one from the Naruto series who has turned to the dark side. Other main characters could be the members of Naruto's team, who support him in his journey to understand and combat the darkness. They could provide different perspectives on how to deal with the dark elements in the story.
Obviously, Naruto is likely to be one of the main characters. There might also be some original characters created for this fanfic who are native to the area of the red sand. And perhaps some of Naruto's friends from the original series like Sasuke or Sakura could also make appearances depending on the plot.
It's hard to say without actually reading the fanfic, but it could be a new character who has the red rinnegan. Maybe this character is an outcast from a well - known ninja clan because of their unique eye power. Or it could be an existing character from the Naruto series who somehow acquires the red rinnegan and then becomes the focus of the story.
I'm not sure specifically as I haven't read this fanfic. But generally, in a Naruto fanfic, it could be about a character seeing red in anger and going on a journey of revenge or self - discovery within the Naruto universe. It might focus on a character's struggle with their emotions and how they interact with other well - known Naruto characters.
Sasuke is also frequently a main character in these fanfics. Imagine if Sasuke had red eyes instead of his Sharingan. It could completely change his character arc. He might be even more of an outcast or have a different set of powers that make him both feared and respected. And then there are the Akatsuki members. Some fanfics might make one of them have red eyes and explore how that changes their role within the organization and in the overall Naruto story.
It could be that Naruto is betrayed by someone he trusts deeply in this fanfic, which makes him see red. He then has to deal with the emotional turmoil while also finding a way to overcome the situation and either forgive or take revenge, depending on the direction the author takes.
You can try looking for it on popular fanfic websites like Fanfiction.net or Archive of Our Own. These platforms usually have a large collection of Naruto fanfics.
Since I haven't read the fanfic, I can't say for sure who the main characters are. It could be original characters created by the author of the fanfic, or it could be characters from an existing franchise that the fanfic is based on.
Since I don't know the exact 'seeing stars story', it's hard to say. It could be an individual who has an out - of - body experience and sees stars during it.
I'm not sure as I haven't read it. Maybe there's a young protagonist trying to make it in a new environment.