The main characters include Naruto Uzumaki, who is known for his energetic and determined nature. Sasuke Uchiha, whose family's tragedy shapes his character. And Sakura Haruno, who starts as a somewhat naive girl but grows into a strong kunoichi. There are also Kakashi Hatake, Naruto's teacher, who has his own secrets and a laid - back yet capable demeanor.
Naruto Uzumaki is a main character. He is a young ninja with big dreams. Sasuke Uchiha is another important one. He has his own dark past and complex personality.
There could also be characters in the new world who act as friends or foes to the main character. Maybe there's a wise old man in the new world who becomes a mentor - not in the Naruto - style but still gives useful advice. And of course, there might be antagonists who oppose the main character's rise with the Naruto system, perhaps fearing the change it brings.
In 'Reborn into Naruto World with Tenseigan Novel', the main character is the person reborn into the Naruto world with the Tenseigan. This character will have to navigate the complex world of Naruto, dealing with the various ninja clans, politics, and battles. There may be a mentor - like figure who helps the main character understand and control their newfound power. And then there will be antagonists, perhaps jealous of the main character's power or having their own evil plans for the Naruto world. The interactions between these characters are what drive the story forward.
Well, Naruto is the central figure. Other important characters could include Kakashi. He might serve as an advisor to Naruto, using his wisdom and experience. And then there's Naruto's son, Boruto. He could play a role in the story, either as Naruto's heir - apparent or as a young ninja learning from his father's great achievements.
Sasuke Uchiha is also commonly featured. His search for power, his relationship with Naruto, and his vendetta against his brother are all themes that might be delved into in the light novels.
Sakura would be a likely main character. She is a skilled medical ninja, so she could play a crucial role in ensuring the health of those involved in the repopulation efforts. For example, she could develop new medical procedures to help with childbirth or deal with any potential health issues that might arise during pregnancy.
Obviously Naruto would be the main character as the title implies. He is the one creating the world, so he would be at the center of the story.
Well, not having read the 'naruto jinchuriki of the world eater fanfiction', it's all speculation. The Jinchuriki is bound to be a main character. If it's set in the Naruto universe, Kakashi could also be in it. He might be in a position of trying to protect the Jinchuriki from those who would misuse the 'world eater' power. There could be a group of rogue ninjas who are after the Jinchuriki's power, and they could be major antagonists. And there may be a mysterious character who has a connection to the origin of the 'world eater' and has their own agenda regarding the Jinchuriki.
Without having read the 'the world in 9 1 2 novel', it's impossible to accurately name the main characters. However, if we assume that the numbers 9, 1, 2 are related to the characters in some way, perhaps there are nine siblings and one of them, the firstborn (represented by 1), has a special relationship with a character who is an outcast or different in some way (represented by 2). But again, this is just wild speculation.
Sakura could be one of the main female characters. In this fanfiction, she might have an even more prominent role. She could be a leader or a mentor to Naruto in the female - dominated world. Another could be Hinata. Maybe she has a different personality, being more assertive in this female - centric world and she and Naruto form a different kind of bond.
The main characters would surely include Naruto. Since he's the one returning to his world. His friends from the village, like Shikamaru who is smart and could be involved in strategizing when Naruto comes back. And Hinata, as she has a special relationship with Naruto. Also, villains or antagonists that Naruto has to face or reconcile with could also be important characters in the fanfic.