In 'naruto demon takeover magic fanfiction', Kakashi could also be a main character. His Sharingan and his vast knowledge of jutsu might make him a target for a demon takeover. Or perhaps he's trying to stop someone else from being taken over. And then there are the Akatsuki members. Their dark nature and power - hungry ways could lead them to experiment with demon takeover magic.
Naruto himself could be a main character in such fanfiction. Since he already has the Nine - Tails inside him, it's easy to imagine a story where he has a different kind of demon takeover. Another could be Sasuke. His quest for power might lead him to dabble in some dark magic involving demon takeovers.
Sasuke could also be a main character in such fanfictions. His quest for power and knowledge could lead him to dabble in time magic. He may want to use it to change his clan's past or gain an upper hand in his rivalry with Naruto.
Often, Naruto himself is involved. Since it's in the Naruto universe, he might be the one to encounter the Demon of the Mist and try to figure out what to do about it. Also, characters from the Mist Village like Zabuza or Kisame could be main characters as they have connections to the Mist and its secrets.
Sasuke is often involved. Since he and Naruto have a complex relationship, his reaction to Naruto's demon form can be a major plot point. He might be initially suspicious or even see it as a new way to compete with Naruto. Sakura could also be there. She might be worried about Naruto and try to find a way to help him control this new form.
In many cases, Ra's al Ghul, who is often associated with the Demon Head concept, is a central figure. His complex relationship with Batman adds a lot of depth to the fanfiction. Also, characters like Alfred, Batman's loyal butler, may play important roles. He could be the one providing Batman with crucial information or moral support during the encounters with the Demon Head. There may also be other members of the Bat - family, such as Batgirl, who might get involved in the story to help Batman deal with the Demon Head - related threats.
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.
Obviously Naruto himself is a main character. He is the one with the pacemaker so he is central to the story. Sasuke might also be involved. He could be initially skeptical of Naruto's new situation with the pacemaker but then come around to help. Sakura too, as a medical ninja, she could play a crucial role in understanding and perhaps even trying to modify the pacemaker.
Naruto is almost always a main character in 'naruto dice fanfiction' as the story is based on the Naruto universe. His friends like Sasuke and Sakura also often appear. Sasuke's cool and brooding nature can add an interesting dynamic when combined with Naruto's more upbeat and impulsive personality in stories related to the dice.
Naruto himself is obviously a main character in such fanfictions. His growth in intelligence is usually the central focus. Sasuke can also be involved as Naruto's rival or ally in situations where intelligence plays a crucial role. Sakura, with her own intellectual capabilities in medical ninjutsu and general knowledge, often appears as well.