Well, Naruto would obviously be the main character as the story is centered around him being a half - demon. There might also be characters like Sasuke. Sasuke could be involved in Naruto's journey, perhaps initially being suspicious of Naruto's new powers but later coming to accept and even help him control them.
Sakura could be another main character. She might play a role in Naruto's life by being one of the few in the village who tries to understand his half - demon situation. She could use her medical skills to help Naruto when his demon side causes him physical or mental distress.
Orochimaru would be a great main antagonist. He's always been interested in power and the secrets of the body. Naruto's half - demon fox nature would be a prime target for his experiments. He could try to extract the power of the demon fox from Naruto, or use Naruto as a way to create his own brand of super - soldiers with demon - like powers.
Since I haven't read it, it's hard to say for sure. But it could be the usual Naruto characters like Naruto himself, Sasuke, or Sakura if the demon blade is something that gets involved in their storylines. Maybe there's a new character introduced specifically for this fanfic who is the one directly related to the demon blade, like a wielder or a protector of it.
I think Naruto is the central character. His friends, such as Kakashi, who was his teacher, would also be main characters. They would be involved in Naruto's journey of dealing with being labeled as a demon in Konoha. Additionally, any villains or antagonists who oppose Naruto because of his 'demon' status could be main characters. For example, if there are some villagers who are against Naruto and try to drive him out, they could be considered main characters in the context of this fanfic.
Since I haven't read it, I can't say for sure. But it's likely that Naruto could be one of the main characters given that it's in the title. There might also be new characters created specifically for this fanfic, like a demon breeder character who could be central to the story.
Obviously Naruto would be one of the main characters since the title mentions him. There might also be characters like Kakashi who could be guiding Naruto through this situation with the demon in the lake.
Obviously, one of the main characters would be the demon. Another would be the princess. And depending on how the story is written, Naruto and some of his friends like Sasuke or Sakura might also be important characters as they could be involved in the events related to the demon and the princess.
Obviously, Naruto would be one of the main characters. There might also be some original characters created specifically for this fanfic that are from the demon village. They could be demon villagers with unique powers or personalities.
Well, obviously Bella is a main character since the title is centered around her. She is the half - demon with a unique set of powers and challenges.
It could be a powerful ninja from another village who is jealous of Naruto's half - demon half - god powers. He might see Naruto as a threat to his own village's dominance and try to eliminate him.
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.