Naruto himself is often involved as the story usually revolves around the impact of the 'evil pieces' on the main characters. Sasuke could also be a central figure as his complex personality and his own search for power could make him a target or a wielder of the 'evil pieces'. Kakashi, being a strong and influential character, might also get involved in the events related to the 'evil pieces' to protect the village or his students.
Well, Naruto and Sasuke are almost always at the center of 'naruto evil pieces fanfiction'. Naruto because he is the protagonist of the original series and his reaction to the 'evil pieces' would be a major part of the story. Sasuke, on the other hand, has his own vendetta and thirst for power which could be amplified or changed by the 'evil pieces'. Additionally, characters like Jiraiya might be involved as he is Naruto's mentor. He would likely try to guide Naruto away from the influence of the 'evil pieces' or find a way to counter their power.
Obviously Naruto himself is a main character. He's usually at the center of the story as he's the one dealing with the influence of the Evil God. Sasuke is also often involved, maybe as a rival or an ally depending on the plot. Sakura might be there too, trying to help Naruto or deal with the chaos the Evil God brings.
The Volturi are frequently in 'evil bella fanfiction'. Since Bella's actions, if evil, would likely draw their attention. They would be the ones trying to maintain order in the vampire world and would see Bella as a threat. Alice might also be involved as she can see the future and would be trying to predict Bella's next moves.
In some cases, villains from the original SVTFOE series could be main characters in relation to the evil star fanfiction. For example, Toffee. He might have some sort of connection to the evil star, either trying to use it for his own evil purposes or having some past history with it that is revealed in the fanfiction. There could also be new characters created specifically for the fanfiction that are related to the evil star, like a guardian who was tasked with keeping it in check but failed.
Naruto himself is often a central character in 'naruto destruction fanfiction'. Since he is the main protagonist of the original series, fanfiction writers like to put him in situations where he has to deal with destruction. Sasuke is also frequently involved as his rival, and their relationship can be explored in the context of destruction, like if they have to work together to stop a greater threat of destruction.
Well, Naruto is obviously a main character in most of these. But there could also be Sasuke. He might be either an ally or an adversary in relation to the dagger. For example, if the dagger has a power that can either be used for good or evil, Sasuke could be tempted by its darker potential.
Some fanfictions might also include characters like Kakashi in important roles. As Naruto's former teacher, he could be a guiding figure or someone who has to adapt to Naruto's new level of power. He might also be involved in trying to keep Naruto's power in check if it starts to have negative effects on the ninja world.
Naruto himself is often a main character in naruto helmet fanfiction. Since he is the protagonist of the original series, it makes sense that he would be involved with a special helmet in fan - created stories. He could discover the helmet's powers and use them to become even stronger.
Naruto himself is often involved. Since he's the main character of the original series, in fanfiction with loopholes, he might use some loophole to achieve his goal of becoming Hokage faster or getting stronger in a unique way. Sasuke could also be a main character in such fanfictions. He might find a loophole to deal with his quest for revenge or his power - seeking in a different manner.
In many Naruto scream fanfiction, Kakashi Sensei can also play an important role. He might be trying to teach Naruto how to control his scream in a more strategic way, or he could be using Naruto's scream as a signal during a mission. Also, characters like Jiraiya might be involved. Jiraiya could be training Naruto to use his scream as a form of attack or defense, as part of some new and unique jutsu.
Definitely Naruto as the victim of hypothermia. Shikamaru could also be involved. He might be the one strategizing the rescue mission, using his intelligence to figure out where Naruto could be in the cold environment. And Hinata might be there too, her concern for Naruto adding an emotional aspect to the story.