Hinata Hyuga can be quite popular too. Her relationship with Naruto in the original series was endearing, and in fanfiction, there could be new developments. For example, the reincarnated Naruto might notice and act on Hinata's feelings much earlier, leading to a different kind of relationship dynamic.
Sasuke Uchiha also remains a popular character. His complex relationship with Naruto is a central part of the original series, and in fanfiction, it's often explored further. The reincarnated Naruto might have a different approach to dealing with Sasuke's issues and their rivalry.
Naruto is often a popular character in these fanfictions. Since he is part - Uzumaki, his story can be further explored in relation to his pureblood Uzumaki heritage. Another one could be Kushina, Naruto's mother. Her past and her role in the Uzumaki clan can be delved into more deeply.
Naruto Uzumaki himself is often a very popular character in Uzumaki fanfiction. Since he is the main character in the original series and has Uzumaki blood, many fanfictions expand on his story, giving him new adventures or exploring different aspects of his powers.
Kakashi is another popular character. Fans often like to see how he reacts to the reborn Naruto. Maybe the reborn Naruto can teach Kakashi something new, or they can work together in a different way compared to the original story. His cool and mysterious personality adds an interesting dynamic to the fanfiction.
Naruto himself is often a very popular character in these fanfictions. His connection to the Uzumaki clan and his growth as a ninja provide a lot of material for writers to explore. Hinata is also popular as she has a relationship with Naruto and her own unique abilities.
Naruto himself is obviously very popular. Fans love to explore more of his story, his growth, and his relationships in fanfiction.
Karin is also a popular character. As a full - blooded Uzumaki, she has a lot of potential for development in fanfiction. Writers can explore her backstory more, like her time in Orochimaru's lair and how her Uzumaki powers could have been used differently. Maybe she forms a team with other Uzumaki characters and they go on adventures together.
One interesting plotline could be the main character using their prior knowledge to quickly master jutsu that Naruto struggled with in the original story. For example, they might be able to perform the Rasengan much earlier and with more finesse, which would change the way early battles play out in the Naruto universe.
Some fanfictions introduce a young and prodigious ninja as an original character. This character could be a rival to Naruto at first, but then they become friends and together they face greater threats. Their relationship and the new dynamics they bring to the story make them popular among fans.
In Uzumaki clan fanfictions related to Naruto and Hinata, Kakashi can also be a popular character. He was Naruto's mentor and has a deep connection to the village. His presence can add some stability and wisdom to the stories, especially when the new Uzumaki - Hyuga family faces challenges. Also, Sasuke can be popular as he has his own complex relationship with Naruto and his family, and his skills can be involved in the plot when it comes to protecting the Uzumaki clan or dealing with threats against Naruto's family.
Kushina is also quite popular. As Naruto's mother, she has a rich backstory. Fanfictions often explore her life before Naruto was born, her relationship with Minato, and her role in the Uzumaki clan. Her strong - willed nature and unique abilities make her an interesting character to write about in the context of the Uzumaki family.