One of the popular characters is Hinata. Her love for Naruto and her own Byakugan abilities can play an important role. Gaara is also often included. His transformation from a lonely and feared shinobi to a respected leader makes him an interesting addition. And of course, Jiraiya. His influence on Naruto and his own skills as a sage are great elements to bring into a fanfiction.
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 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 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.
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.
Kakashi is a great addition. He has a long history with both Naruto and Sasuke and can act as a mentor or a source of wisdom. Sakura can also be included. Her relationship with both Naruto and Sasuke adds depth to the story. She can be a strong female character who helps or challenges them. Shikamaru is another good one. His intelligence can bring new perspectives to the plot.
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.
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.
Sakura could be an important character. In a Fem Sasuke and Naruto fanfiction, Sakura might be jealous of the relationship between Fem Sasuke and Naruto at first, but then she could grow to accept it and even become a good friend to Fem Sasuke. Kakashi is also a great addition. He could be the one to mentor Fem Sasuke and Naruto, teaching them new jutsus and guiding them on their ninja paths. Another character could be Gaara. He might be an ally or an opponent in the story. If he's an ally, he could team up with Fem Sasuke and Naruto to fight a common enemy. If he's an opponent, it would add an interesting dynamic to the story as they have to face off against his powerful sand abilities.
Kakashi is also well - liked. As Naruto's former teacher and a respected ninja in his own right, he can play a mentor role even when Naruto is Hokage. His laid - back yet highly skilled nature is fun to write about.
Iruka could be an interesting character to include. He has always been important in Naruto's life and could provide a different perspective on the Second Hokage's story. Hinata could also be part of it. Her gentle nature could contrast with the more battle - oriented characters. And Rock Lee, with his dedication to hard work and the ninja way, could be inspired by the Second Hokage's own determination and contribute to the story in his own unique way.
Kakashi would be a great addition. His wisdom and combat skills could add depth to the story. He could act as a mentor figure, guiding Naruto and Sasuke through the strange situations they find themselves in due to the fox - related elements.