Well, Jiraiya is often a popular character in these types of fanfictions. He is Naruto's mentor and has a lot of knowledge about the ninja world. In a time - travel story, he could learn from Naruto about the future and use that to his advantage, or he could teach Naruto things he didn't learn before. Also, Sakura could be a popular character. She might follow Naruto and Sasuke back in time and have her own role to play, like using her medical skills to save people who died in the past.
I think Kakashi could be really popular. Since he has a connection to both Sasuke and Naruto, his role in a time - travel story could be very interesting. He might be able to help them adjust to the past or use their knowledge to his advantage. Another popular character could be Itachi. His actions in the past are so crucial to the story, and in a time - travel scenario, he could interact with Sasuke in a whole new way.
Definitely Tsunade. She's a powerful character and her knowledge of the village's history and politics could be a great asset in a time - travel story. She could also be a bit of a challenge for Naruto and Sasuke as she might not believe their claims of coming from the future right away. And Orochimaru is another character that might be popular. His thirst for knowledge and his experiments could be intertwined with the time - travel plot in some very interesting ways.
Sakura is often quite popular. In college fanfiction, she might be a brilliant medical student, still having her feelings for Sasuke while also becoming good friends with Naruto. Her strong - willed nature and intelligence can add a lot to the story.
Kakashi Hatake is a popular choice. He has a long history with both Naruto and Sasuke, having trained them. He could be included to offer guidance or add some comedic moments. For example, he could give them some tough training exercises that help them bond more. Another popular character is Sakura Haruno. She has her own complex relationship with both Naruto and Sasuke. Her presence can add some drama, like if she has to choose between helping Naruto or Sasuke in a difficult situation.
Sakura is a very popular character to include. She has a long - standing relationship with both Naruto and Sasuke. Her medical ninjutsu skills can be very useful in various plot situations. Kakashi is also popular. His experience and unique jutsu can add depth to the story. Another popular character is Shikamaru. His intelligence can be a great asset in devising strategies against enemies.
Kakashi is often a popular character. He has a lot of knowledge and skills, and his presence can add an interesting dynamic. He might be the one to discover Naruto and Sasuke's time - traveling secret and help them navigate the changes they're trying to make. Another one could be Sakura. She might be involved in different ways, like trying to figure out why Naruto and Sasuke are acting so differently due to their time - traveling knowledge.
Obviously Naruto and Sasuke themselves are very popular. Their relationship and how it changes through time travel is a major draw. But also, characters like Kakashi can be popular. If Naruto and Sasuke travel back, Kakashi's reaction and how he interacts with them knowing their future selves can be really interesting.
Gaara is a character that can be well - written in this context. He has his own experiences with darkness and redemption. He might understand Naruto's possible fall into evil in a different way compared to others. He could offer his unique perspective to Sasuke on how to deal with Naruto. Also, Tsunade could be important. As the Hokage, she has to make difficult decisions regarding the threat that an evil Naruto poses to the village and how to support Sasuke in his efforts to stop Naruto without causing too much destruction.
One common trope is changing the past. For example, in many fanfictions, they go back in time to stop a major event like the Uchiha massacre. This gives the characters a chance to rewrite history in a way that could have a huge impact on the Naruto universe. Another trope is the fish - out - of - water scenario. Since they are from a different time in their own world, they often have to adapt to the ways of the past, which can lead to some funny and interesting situations.
Their children are also very popular. Boruto and Sarada, for example. Fanfiction often explores their relationship as the children of two of the most important ninjas in the village. They might have a lot of pressure on them, and exploring how they deal with that while also having their own friendship or rivalry is great content.
Sometimes, other characters like Kakashi also shine in these fanfictions. When Naruto and Sasuke time travel, Kakashi might be in a different stage of his life. Writers can explore his past more deeply or show how he reacts to Naruto and Sasuke's out - of - time presence. His wisdom and combat skills add an interesting dynamic to the story.
Another popular plot twist is that when they travel back, they find out that the past isn't exactly as they remembered it. There could be some hidden secrets or different motives of the characters they thought they knew well. For instance, they might discover that a certain villain had a more complex backstory and wasn't always evil. This changes their perspective on how to deal with things in the past and future.