Some fanfics might introduce original characters. For example, a young girl who has a natural affinity for the summoned dogs but comes from a non - ninja family. She might be discovered by Naruto or Kakashi and then be trained to use her ability. This new character could then become a central part of the fanfic, interacting with the well - known Naruto characters and the summoned dogs.
Naruto himself is often involved. Imagine a fanfic where Naruto finds a strange mask that gives him new powers, but also has some negative side - effects. Sasuke can also be a main character in such fanfics. He might be on a quest to find a mask that has a connection to his clan's history.
The Kazekage is the central figure in 'naruto kazekage fanfic'. But we also see characters like Sakura. She is a strong kunoichi and her medical skills could come in handy in a story set in the Naruto world. Another character often involved is Shikamaru. His intelligence could play a crucial role in any plot related to the Kazekage. And of course, the Sand Village elders might be important characters as they have influence over the Kazekage and the village's decisions.
Kakashi Hatake is often a main character in 'raikiri naruto fanfic' since he is the one who originally developed the Raikiri. His skills and the way he uses the Raikiri can be further explored in fanfics.
Naruto himself is often involved. He might use bubblegum in his usual impulsive and creative ways, like coming up with new pranks or battle strategies. Sakura could also be a main character. She could use her intelligence to develop new types of bubblegum or figure out how to counter an enemy using bubblegum. Sasuke might be involved too, perhaps reluctantly at first, but then finding that bubblegum has some unexpected uses in his quest for power.
Kakashi can also be involved in some shukaku naruto fanfic. He could be Naruto's mentor in understanding the Shukaku better. He has a wealth of knowledge about the ninja world and could offer advice to Naruto on how to handle the power of the Shukaku and any potential risks associated with it.
Naruto is often involved. Since he's the main protagonist, writers like to put him in situations where he has to deal with deception, either being deceived or trying to deceive the enemy. Sasuke is also a common character in such fanfics. His complex personality and his past actions make him a great target for deception plots or a character who could be doing the deceiving.
Sasuke could also be a central figure. His pursuit of power and his unique sharingan abilities could interact in interesting ways with the elemental orbs. Maybe he wants to use the orbs to get revenge or to achieve a new level of strength to rival Naruto.
Naruto himself is often involved. Since he has a strong will, it's interesting to see how he would deal with being possessed or using the possession jutsu. Sasuke is another common character. His dark past and powerful abilities make for great storylines when combined with possession jutsu.
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.
Naruto himself is often involved in Naruto seals fanfic. Since he's the main character in the original series, writers like to explore his potential with seals further. Sasuke is also a popular choice. His Uchiha heritage and his own power - hungry nature make for interesting stories when combined with seal knowledge. Kakashi is another one. His Sharingan and his vast knowledge of jutsu could lead to some really creative seal - related scenarios. And of course, Jiraiya, as he was a master of many things including seals, and his relationship with Naruto can be further developed in fanfic with a focus on seals.