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.
A young and ambitious ninja who has grown up in the Demon Village could be a main character. They might be the son or daughter of a well - known ninja in the village and are eager to prove themselves.
Definitely Naruto and Sasuke. Naruto is the one leaving the village, so he's a central figure. Sasuke, given the 'narusasu' aspect, is bound to play a crucial role too. He could be the one Naruto is leaving behind, or he could be the one who follows Naruto out of the village. There might also be other supporting characters from the Naruto universe like Kakashi or Sakura who could be affected by Naruto's departure.
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.
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.
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.
Often, Naruto himself remains a popular character even in Demon Village fanfiction. His journey and growth can be interestingly adapted to fit into the Demon Village setting. Sasuke is also quite popular as his power - hungry nature can be explored in relation to the demon - related powers in the village. Another popular character could be a new original character created specifically for the Demon Village. This character might have a special connection to the demons, like being able to communicate with them.
It could be that in this 'naruto of the demon village fanfic', Naruto discovers a hidden power within the demon village. This power could be related to an ancient demon that once lived there. He then has to figure out how to control or use this power for the greater good, while also dealing with the internal politics and power struggles within the demon village.