In Naruto legacy fanfiction, apart from the next - gen characters like Boruto, Sarada (Sasuke and Sakura's daughter), and Mitsuki, sometimes the original characters also play important roles. They could be mentors or still be involved in major events. And there may be new characters created specifically for the fanfiction that interact with both the old and new generations, adding new dynamics to the story.
The main characters can vary greatly. Some fanfictions might focus on an entirely new group of ninjas who are influenced by the legends of Naruto and his comrades. They could be from a different village that was inspired by the changes Naruto brought to the ninja world. However, it's common to still see the original gang, even if in a more background or guiding role, as their legacies are what the fanfiction is often built upon.
Often, the descendants of the original Naruto characters are main characters. For example, Naruto and Hinata's son, Boruto, might be a central figure.
In addition to Naruto's family, his old friends such as Sasuke could also be main characters. Sasuke might be involved in trying to find a way to break Naruto's seal or protecting the village in Naruto's absence. Other characters like Kakashi, who has a long - standing relationship with Naruto, could also be important in this fanfiction.
The main characters in 'Naruto Legacy of the 7 Swordsmen Fanfiction' are most definitely the 7 Swordsmen. These are characters who have a long and storied history in the Naruto universe. Their swords are not just weapons but symbols of their power and status. Additionally, there could be new characters introduced in the fanfiction that are related to the 7 Swordsmen in some way, perhaps descendants or students. And of course, we can't rule out the appearance of some of the main Naruto protagonists like Naruto Uzumaki, who might get involved in the affairs of the 7 Swordsmen for various reasons such as to protect the village or seek knowledge about their powers.
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.
Well, if it follows the Naruto series closely, Naruto himself could be a main character. He might be the one to bridge the gap between the Naruto world and the Legacy of Kain elements. Sasuke could also be there, as he often plays a major role in Naruto - related stories. But it could also introduce new characters inspired by Legacy of Kain.
Obviously, Madara himself is a main character. He is the center of the story's legacy aspect. Naruto might also be a main character as he often represents the new generation and the hope for change in the Naruto universe. He could be the one to either oppose or understand Madara's legacy in the fanfiction.
Kisame himself would obviously be a main character. He's the center of the 'legacy' aspect. Also, characters like Itachi Uchiha are likely to be important since they had a significant relationship with Kisame in the original Naruto story. Naruto Uzumaki could also be a key character as his story is so intertwined with the overall Naruto world and Kisame was part of the Akatsuki that Naruto had to deal with.
Often, Naruto himself is a main character in such fanfiction. Since he is the protagonist of the original series and the story might explore how Indra's legacy affects him. Sasuke is also likely to be involved as he has a connection to the Uchiha clan which has ties to Indra. Madara Uchiha could also be a prominent character as he was deeply influenced by the legacy of Indra.
Typically, the main characters are the founders of the important ninja clans in Naruto. So, Hashirama Senju, who was known for his great strength and ability to control wood. Tobirama, his brother, was also a very powerful ninja. Madara Uchiha, the fearsome Uchiha leader. And Izuna Uchiha, Madara's younger brother. In the fanfiction, we might also see other characters who were associated with them, like their friends, comrades, or early adversaries, but the founders are the main focus.
Often, the main characters can be the descendants of the original Naruto characters. So, we might see Naruto and Hinata's son or daughter as a main character, carrying on the Uzumaki legacy.
I don't know specifically as I haven't read it. But it could include Naruto himself, along with some of his friends like Sasuke or Sakura. Maybe there are also characters inspired by historical figures from the Jin Dynasty.