Often, Naruto himself is likely to be one of the main characters. He might be drawn to the power of the Blades of Chaos and try to use them for the good of the village.
Sasuke could also be a main character. His desire for power might lead him to be interested in the Blades of Chaos, and he could either be an ally or an adversary depending on the story.
There could be an original character created specifically for the fanfiction. This character might be the one who first discovers the Blades of Chaos and then becomes central to the story as other characters interact with them and the blades.
Another way is through a series of trials. There could be some sort of magical or ninja - related challenges set up. If Naruto passes all of them, he earns the right to have the Blades of Chaos. These trials could test his strength, intelligence, and his ability to make the right choices in difficult situations.
Grover could also be a main character. He could use his nature - related abilities to assist Percy when he wields the Blades of Chaos. For instance, he might be able to sense danger in the environment that Percy can then use the blades to face. Grover could also help Percy find his way in places where the Blades of Chaos' power might be affected by the surrounding nature.
Maybe a plot where a character creates their own 'Blades of Chaos' -styled weapon using their unique chakra abilities. They then have to learn how to control it while facing off against powerful enemies who want to steal their new weapon. This would involve a lot of character growth and cool fight scenes.
In a fanfiction where Naruto has the Blades of Chaos, his character development might also be affected. He'd have to learn to master these new weapons, which could lead to new friendships or rivalries. For example, he might meet someone who also wants the blades or an expert in using similar weapons who could teach him. This new power would also put him in a different position in the ninja world, perhaps making him a target for those who fear his new strength.
Obviously Naruto would be one of the main characters. And there could be some original characters created specifically for this fanfiction related to the chaos dragons, like a dragon rider who teams up with or opposes Naruto.
Another possibility is that the main character is a sensei or an elder in the ninja village who has knowledge about the Chaos Release. They guide the younger generation in understanding this power. In some fanfictions, it could be a group of characters, each with their own relationship to the Chaos Release, working together or against each other depending on their goals.
Obviously Naruto would be one of the main characters. But depending on the story, there could be other characters like Sasuke, Sakura, or even some original characters created by the fanfiction author.
Well, it's possible that some new or less - known characters from the Naruto universe could become main characters in 'chaos naruto fanfiction'. For example, Rock Lee could take on a more central role. He has always been a character full of determination and unique fighting style. In a chaotic setting, his strong will could be a key factor in dealing with the chaos. And then there are the jinchuriki of the other tailed beasts who might be more prominently featured as they are all related to the power dynamics in the Naruto world which could be thrown into chaos.
It's hard to say for sure without reading it, but it could be Naruto and his friends. They are the main characters in the original series, so it's likely they'll play important roles in this fanfiction as well, perhaps trying to combat the chaos.
Obviously Naruto would be one of the main characters. There might also be his usual friends like Sasuke and Sakura. But since it's a fanfiction about him being the heir of chaos, there could be new characters introduced who are related to this chaos aspect, like some ancient beings or a secret clan.