Naruto himself is often a popular character in such fanfics. Since he has a natural affinity for different types of chakra, it's interesting to see how he would adapt to the lightning sage powers. Another could be Sasuke. His sharingan and his quest for power could be combined with the lightning sage abilities in an exciting way.
In naruto lightning sage fanfic, Kakashi can also be a popular character. His intelligence and vast knowledge of ninjutsu could play a great role in exploring the lightning sage techniques. He could be a mentor figure or even a fellow learner. Also, Jiraiya might be popular as he is known for his toad sage mode and his connection to Naruto. Writers might explore how he could help Naruto or other characters with the lightning sage powers.
There are also some original characters that can become popular in naruto lightning sage fanfic. For example, a young shinobi who discovers the lightning sage powers on their own and has to prove themselves in a world full of established ninja. These original characters can bring new perspectives and storylines to the fanfic, adding to the overall richness of the lightning sage concept within the Naruto universe.
Naruto himself is often a popular character in these fanfics. Since he is always eager to learn new powers and grow stronger, it's easy to imagine him being drawn to the dragon sage power. He could incorporate it into his existing arsenal of jutsu and become even more formidable.
The sages like Jiraiya are popular. Fanfictions might bring him back in some way to continue guiding Naruto in his sage journey. Also, characters like Fukasaku and Shima, the toad sages, are often included as they play important roles in Naruto's development of sage mode.
One interesting plotline could be the main character's journey to master lightning sage techniques. They might face challenges like finding a suitable teacher, perhaps an old hermit who has a unique way of teaching. Another could be the discovery of a hidden power within the lightning sage mode that has been forgotten for centuries.
Sasuke is another popular choice. Given his thirst for power and his natural aptitude for lightning - based techniques, fanfiction writers often explore how he would obtain and master the Black Lightning. It could be a part of his journey to become even stronger and seek revenge against his enemies.
Obviously, Naruto is the central character. But there are also often other characters like Jiraiya. Since Jiraiya was Naruto's mentor in the original story and had knowledge about sage mode, he often appears in fanfics to guide Naruto in his training. Another common character could be Kakashi. He may offer some advice or support to Naruto during the training process.
Since it's a Naruto - centered fanfic, Naruto is the main character for sure. But other characters from the Naruto universe might also play important roles. Sasuke could be there, perhaps as a rival or an ally at different points in the story. Sakura might also be involved, maybe as a healer or a support for Naruto in his journey to become a sage. There could also be new characters created specifically for this fanfic that have a connection to Naruto's path as a sage.
It could be a rogue ninja who was once rejected from the lightning sage training and now wants to destroy the entire concept of the lightning sage. He might have developed his own dark lightning - based techniques to oppose the traditional ones.
Some fanfictions might also focus on a well - known Naruto character like Sasuke but give him the red lightning bloodline. This changes his fighting style and abilities, making him even more powerful and interesting. Fans like to see how a character they already know would be different with this new bloodline.
Raikiri is often a popular character in these fanfictions. His ability to use the Lightning Bloodline is quite remarkable and many fanfictions explore his backstory and how he became so proficient with it. He's a character that fans love to see in different scenarios, whether it's training a new generation or facing off against powerful enemies.
Hinata could also be a main character. Her relationship with Naruto could take on new dimensions as he becomes the Sage of Six Paths. Maybe she helps him in some way to control or understand his new powers, or they face challenges together that test their relationship.