Kakashi can be a popular character in 'Naruto Fist' fanfiction too. As a skilled and experienced ninja, he could be the mentor figure guiding a young ninja in their journey to master the Naruto Fist. His knowledge and wisdom would be valuable assets in the story.
Naruto himself is often very popular in 'Naruto Fist' fanfiction. Since it's related to a technique named after him, writers like to explore new aspects of his character in relation to this. He might be shown teaching others the Naruto Fist or coming up with new variations of it.
Sometimes, an original character created specifically for the fanfiction could be a main character. This character could be a mentor - like figure who teaches Naruto about the dragon fist. They might have a deep knowledge of the technique's origin and its true potential, guiding Naruto on his journey to master it.
I don't know specifically as it depends on the fanfiction. It could be Naruto and his friends if the 'ninth fist' is something they encounter or develop.
Rock Lee would be a strong contender. He's dedicated his whole life to taijutsu. His ability to open the gates gives him superhuman strength and speed, which would make him a formidable fist fighter.
Gaara is another popular choice. His past of being an outcast in Naruto's world can be paralleled or changed in the Digimon - influenced story. Maybe he finds a sense of belonging with a particular Digimon that also had a rough start. His sand powers could also have interesting interactions with the digital elements, like how he could use his sand to protect his Digimon partner in battle.
Naruto himself is often a popular character in 'naruto hybrid fanfiction'. Writers like to explore different versions of him, like a hybrid with some other powerful entity or a different clan. His already - strong will and determination can be enhanced or changed in interesting ways in these fanfictions.
Naruto himself is often a very popular character in these fanfictions. His ability to adapt and his strong will make him a great fit for the often - dark and challenging world of Berserk - inspired stories.
Boruto, Naruto's son, is also a popular character in Naruto adulthood fanfiction. His own struggles with living in his father's shadow and forging his own path are common themes. Shikamaru, with his intelligence and laid - back yet responsible nature, is another character that is often included in these fanfictions.
Naruto himself can also be a very popular character in these fanfictions. Even though he doesn't have the Ketsuryugan, his interactions with those who do are often explored. He might befriend a Ketsuryugan user and they go on adventures together. His positive attitude and strong will can have an impact on the Ketsuryugan - using characters. Also, Sasuke is sometimes included as he is a well - known and powerful character in the Naruto universe. His relationship with Ketsuryugan - related characters can add depth to the story.
Sasuke is often popular. Fanfiction writers might explore his family's past in more detail, like how his clan was really involved in the politics of the village before their downfall.
Naruto himself is often a very popular character in these fanfictions. Since he's the main character of the Naruto series, he brings his unique skills and personality to the Sengoku era setting. Another popular one could be Sasuke. His cool and brooding nature can create interesting dynamics when placed in the Sengoku context, perhaps getting involved in some samurai battles or political intrigues.