Sasuke would also be a key character. His past actions during the war need to be reconciled, and he could play a role in training the next generation of ninjas, passing on his unique skills.
Boruto is often a popular character as he is the main character in the new generation. His journey to find his own path separate from his father Naruto's is an interesting aspect. Sasuke also remains popular as his skills and complex personality continue to draw readers.
One of the most memorable arcs is the Pain's Assault arc. In this arc, Pain attacks Konoha, and Naruto returns to face him. It shows Naruto's growth as he not only battles Pain but also tries to understand his motives. Another great arc is the Itachi Pursuit Mission arc, which reveals a lot about Itachi's true nature and his sacrifices for Sasuke.
Naruto himself is very likely to have a significant role. He is the main character of the original series, and his strong will and unique abilities would be crucial in any time - traveling adventure. His determination to protect his friends and the ninja world would drive the plot.
Obviously, Naruto would be a main character. His determination and powerful jutsu would be crucial in the rescue mission. Gaara, the Kazekage himself, would also be a central figure even though he is the one being rescued as his past and his role in the shinobi world are important aspects.
Naruto and Sasuke would be very likely to interact. If Naruto has God of War powers, Sasuke might be curious or even envious. They could have a fight or a conversation about these new powers. Another pair could be Naruto and Kakashi. Kakashi would surely be interested in Naruto's new abilities and how they could be used for the village.
Well, Percy is a given. He's the hero of the series. His journey after the war, whether it's about finding peace or facing new challenges, would be a major focus. Then there's Annabeth. She's not only Percy's love interest but also a strong and intelligent demigod. Her role in rebuilding and strategizing post - war would be important. Another character who might be in focus is Thalia. She has a leadership quality and a connection to the Hunters of Artemis. After the war, she could be involved in protecting the demigod world in a different way. And Jason, if he's alive, his experiences in different camps and his relationship with Piper could also be explored in the context of post - war changes.
Obviously Naruto would be the main character since it's about him time - traveling. Sasuke would also likely play an important role. Maybe he's skeptical of Naruto's time - traveling claims at first but then comes to believe him and helps him change things. Kakashi could also be a major character, providing guidance to Naruto based on his own experiences.
Ruby. Since she is the main character, her role and personality can be easily tweaked in alternate universes. For example, she could be more serious or less confident. Blake is also a candidate. Her Faunus heritage could be treated very differently in other universes, which would lead to major changes in her character arc. And then there's Weiss. Her family's influence might be more or less prominent, changing her attitude and actions.
Pain is often a very popular character in Rinnegan fanfiction. His original use of the Rinnegan in the series made him quite an interesting character, and in fanfiction, people like to explore his backstory further or give him new powers. Nagato, who was the original owner of Pain's body, is also popular. He has a complex history and his connection to the Rinnegan can be explored in many ways.
Well, in Naruto Shippuden extreme fanfiction, Naruto and Sasuke are at the top of the list for obvious reasons. Their rivalry and friendship are central to the series, and fans like to explore different aspects of it. But other characters like Itachi also gain a lot of popularity. His tragic backstory and powerful abilities make him an interesting subject for fanfictions. Additionally, Sakura is popular as she is a strong female character, and many fanfictions focus on her development further, either as a medic - nin or in combat situations.