Often, there could be an unnamed or newly created ninja who is the main character. This ninja has lost everything and is now homeless. He or she is usually on a quest to regain their former status or find a new purpose in life.
Naruto himself is obviously a very popular character in 'naruto real ninja fanfiction'. Sasuke is also commonly featured as he has a complex relationship with Naruto. Sakura is another one, often involved in stories that explore her growth as a ninja and her relationships with the other characters.
Obviously, Menma is one of the main characters. He is the focus of this fanfiction.
Naruto himself is likely to be a main character. Since it's related to Naruto, he'll probably be at the center of the story, with his journey to become Hokage or his relationships with other characters like Sasuke and Sakura being explored further.
The main character is clearly fem Naruto. But depending on the plot, characters like Kakashi could also be important. He was Naruto's teacher and could play a role in guiding fem Naruto in using her seduction skills in a proper and strategic way. Also, villains from the Naruto universe might be main characters too, as they would be the ones that fem Naruto would be using her seduction skills against.
One could find stories where the homeless ninja discovers a hidden power within himself while being in that difficult situation. For example, he might find an ancient scroll while rummaging through an abandoned place. This scroll could contain a special jutsu that he then masters, making him a force to be reckoned with. It's all about the journey of self - discovery in the face of homelessness.
The main characters can include the gunsmith, who might be an outsider to the traditional ninja world but has a unique skill set. Another could be a ninja who becomes the gunsmith's protector or partner. For example, Sasuke could be interested in these new firearms as a way to enhance his own power. And sometimes, there are original characters created specifically for the fanfiction, like a rival gunsmith who tries to outdo the main gunsmith in creating the most powerful weapons.
Often, there are also antagonist assassins who are main characters in a sense. They drive the plot by creating conflict. These assassins could have their own motives, like working for a powerful and shadowy organization. Their backstories, which might include things like being orphans trained from a young age to be killers, can add depth to the fanfiction.
Naruto himself could be a main character in such fanfiction. Maybe he gets framed for pickpocketing and has to clear his name while also dealing with the real pickpocket who is causing chaos in the village.
Obviously, the first male ninja would be the main character. But there could also be his mentor, someone who guides him in his ninja training. Maybe an old and wise ninja who has a lot of knowledge about different jutsus.
In many 'Naruto and Hinata Road to Ninja' fanfictions, Kakashi often appears as a supporting character. He has vast experience and knowledge that he can pass on to Naruto and Hinata. Additionally, Rock Lee could be there too. His unwavering determination and powerful taijutsu skills can inspire and support Naruto and Hinata during their journey.