Obviously, Himawari would be one of the main characters. Since it's about her immortality, she's at the center of the story.
Boruto might be another key character. He could be jealous of Himawari's immortality at first, but then they could work together. Or perhaps he has to protect her from those who might want to use her immortality for evil purposes.
Main characters are usually Himawari and Naruto. Naruto's influence on Himawari's life and ninja journey is often explored. In addition, characters like Hinata, Himawari's mother, may also be involved. They can play different roles, like Hinata could be teaching Himawari some family - specific ninja techniques while Naruto is away on a long - term mission.
Obviously, Bolt and Himawari are the main characters. Bolt, being Naruto's son, has his own set of skills and a big personality. Himawari, on the other hand, is also a strong - willed character with her own potential as a ninja.
Obviously, the two main characters are Himawari and Kushina. Himawari, Naruto and Hinata's daughter, brings her own set of skills and personality traits to the story. And Kushina, Naruto's mother, has her own backstory and strong - willed nature that will play a big part in any interaction with Himawari.
They are likely to interact with Naruto's past self. It would be an interesting dynamic as Naruto tries to explain things to his younger self without messing up the timeline too much. And Himawari would be there, perhaps teaching her young father some of her own jutsu.
There could be other characters like Sasuke as well. Sasuke's quest for power and his complex personality might bring him into contact with the immortal wanderer. Maybe he sees the wanderer as a threat or a source of knowledge, which would make their interactions an important part of the fanfiction.
Besides the main trio, characters like Kakashi could still be important. He could be a mentor figure to the immortal Naruto, guiding him through the new challenges that come with his eternal existence. And villains from the original series might also make comebacks to test Naruto's immortality.
Obviously, Himawari Lemon is one of the main characters. There could also be her family members who play important roles, like her parents who support her dreams.
Well, in some 'naruto himawari immortal fanfiction', one interesting idea could be Himawari's exploration of her newfound immortality. She might use it to protect the Hidden Leaf Village in ways that others can't. For example, she could take on extremely dangerous missions without the fear of death.
Well, Naruto for sure. His immortality gives him a unique place in the story. From RWBY, Yang Xiao Long could be a main character. Her brash and confident fighting style would create an interesting dynamic with Naruto. Blake Belladonna, with her mysterious past and cat - like abilities, might also be a central figure. Her more reserved nature compared to Naruto's open - heartedness could lead to some great character development moments. And of course, Ruby and Weiss as mentioned before, would also be important in shaping the story around an immortal Naruto in the RWBY world.
Obviously, Naruto would be one of the main characters since it's in the title. He would be the one with the combined Naruto - Saiyan traits. Another likely character could be Sasuke. Their relationship could be further explored in this new context, with Sasuke perhaps being jealous or in awe of Naruto's new powers. And of course, characters like Kakashi could also play important roles as mentors or allies, guiding Naruto in his journey of exploring his Saiyan - like powers.