Who could be the main characters in 'The Master of Martial Arts Retired Life Novel' besides the master?

Well, it might be about the master exploring new hobbies. Maybe he takes up painting to express his inner peace after a life of fighting.

Sasuke could be one of the main characters. Maybe he and Naruto have a new kind of relationship now that Naruto has retired from the ANBU. They could be working together to protect the village in a different way.

I'm not sure exactly, but likely the martial king himself is a main character. There may also be some characters from his past martial life, like old friends or rivals.

One of the main characters could be Happy, Natsu's loyal flying cat companion. Happy would likely be by Natsu's side during his retirement, still providing his comical relief and support. Another character could be Lucy. She might be concerned about Natsu's retirement decision and try to understand his reasons, or she could also be retiring from her own magical adventures and join Natsu in his new peaceful life.

I don't know the exact main characters as I haven't read it. But it's likely to be the martial kings themselves.

Well, since it's about a martial king's retired life, the martial king is surely one of the main characters. There might also be his former comrades or servants who still interact with him during his retirement. And perhaps there are new characters he meets during this new phase of his life, like neighbors or people who are interested in his past as a martial king.

There are also his former comrades who play important roles. They each have their own motives and personalities. Some are still deeply involved in the martial world, and their interactions with the retired king bring out different aspects of his character.

A possible main character could be a journalist who is intrigued by Master Chief's retirement. The journalist wants to write a story about him and follows him around. Additionally, there could be a group of children on the retirement planet. Master Chief could form a bond with them, teaching them valuable life lessons, and they could be important characters in the fanfiction as they represent the future and hope.

There could be other characters like Sasuke. He might be Naruto's rival in martial arts as well, constantly challenging Naruto to improve. And Sakura could also be involved. Maybe she becomes interested in martial arts because of Naruto and starts learning from him. Also, Kakashi could play a role as Naruto's mentor in martial arts, guiding him with his own knowledge and experience.

Another theme is redemption. Many retired martial artists in these novels have made mistakes or have a dark past in their martial arts careers. They use their retired life to atone for their actions, either by helping others or by facing their past demons. For instance, a character might have killed unjustly in the past and now tries to save lives in his retirement.