Another character could be Kakashi. He has always been Naruto's mentor, and in the 'naruto demon fox lord fanfiction', he might play a role in helping Naruto control or understand the demon fox lord better. He could also be involved in battles or negotiations related to the demon fox lord, given his experience and wisdom.
Naruto is the central figure in most 'demon naruto fanfiction'. In addition to him, there could be an ancient demon lord who serves as the antagonist. There are also times when the other members of Team 7, like Sakura and Kakashi, are involved. Sakura might be worried about Naruto's change, while Kakashi tries to guide him. And sometimes, there are original characters created specifically for the fanfiction, such as a demon hunter who targets Naruto at first but then realizes he's not entirely evil.
Naruto is a must - have main character. In the fox family, there could be a powerful alpha - like fox that serves as a leader and mentor to Naruto within the family context. There may also be a fox cub that Naruto befriends and protects. Other than that, characters like Jiraiya might be involved as he was Naruto's teacher and could have some connection to the fox family lore. Plus, the nine - tailed fox itself could be a central figure in the family, with Naruto having a special bond with it.
The main characters are typically Naruto and the chibi fox. However, in some fanfictions, other characters from the Naruto universe might play important roles. For instance, Jiraiya could make an appearance. He might recognize the significance of the chibi fox in relation to some old ninja legends and guide Naruto in his relationship with the fox. This could add more depth to the story as Jiraiya imparts his wisdom and knowledge.
Obviously, Naruto is the central character. His relationship with the Nine - Tailed Fox is the core of this kind of fanfiction. The Fox itself, which is a powerful and mysterious entity within Naruto's body, is also a key character.
Main characters in naruto demon harem fanfic are Naruto, who is in the middle of all the action. Female characters such as Temari from the Sand Village might also be included. And the demon, which is what makes it a 'demon harem' fanfic. The demon might have its own motives and goals, which often clash with Naruto's. The female characters are caught in between, having their own feelings for Naruto and being affected by the presence of the demon. This complex web of relationships is what drives the story forward.
In many 'becoming a demon naruto fanfic', the main character is often a ninja who has a special connection to the dark or forbidden arts. This connection could be something they inherit, or it could be the result of an experiment gone wrong. There might also be a mentor - like figure who either tries to help the character control their new demon side or is the one who caused the transformation in the first place. And of course, there will be other supporting characters from the Naruto universe, like the Hokage or other ninja comrades, who react to the main character's transformation.
A new character introduced as a Frost Demon is also a common main character. This Frost Demon character could have their own backstory, like being exiled from their own kind and finding a new home in the Naruto world. They would then get involved in the various conflicts and relationships in the Naruto universe, such as forming alliances with the Konoha ninja.
Well, Tsukune himself is obviously a main character. He is the Vampire Lord around which the story revolves. Then, his friends from the school like Moka are often there too. Moka has her own unique charm and powers, and her relationship with Tsukune is always an interesting aspect to explore in the fanfiction.
Another fanfiction could be set in a post - apocalyptic world where the power of the Demon Fox Lord has been misused in Naruto's world, and it has some sort of ripple effect on Inuyasha's world. Inuyasha and Naruto, both having a connection to powerful spiritual forces, must find a way to restore balance. They could start off as enemies, misunderstanding each other's motives, but gradually come to realize they need to work together.
The main characters are often Naruto, as he is the focus of the mecha concept. Shikamaru could also be a main character in this type of fanfiction. He would be the strategist, trying to figure out how to best utilize the mecha Naruto in battles. Additionally, Orochimaru might be a character in some cases. He could be interested in stealing the technology of the mecha for his own evil purposes or trying to manipulate Naruto through it.