Miu could be a key character. She might be the one who stays by Kenichi's side constantly, using her skills to keep him as comfortable as possible while he's sick.
One reason could be to understand the fans better. By seeing what fans create in fanfiction, the characters can get a sense of what the audience loves about them, what they want more of, or what aspects of the story the fans are most interested in. This could help the characters, in a meta - sense, to better fit the expectations of the fans and perhaps influence the direction of future official stories. For instance, if a lot of fanfictions focus on a particular relationship for a character, it might make the character more aware of the importance of that relationship in the eyes of the fans.
One possible fanfic could be about a crossover where Naruto and Kenichi meet. Maybe Naruto visits the world of Kenichi and they end up training together. Naruto could teach Kenichi some of his ninja techniques, while Kenichi shows Naruto his martial arts skills.
There probably is. Many fans create their own interpretations in fanfiction. Naruto and Kenichi are both popular series, so it's not uncommon for someone to combine them in a 'godlike' scenario. However, the quality and availability might vary. Some fanfictions could be really well - written, while others might not be so great. It really depends on the creativity and writing skills of the individual authors.
Another theme is the OC's role in the conflict within the Kenichi world. Whether it's helping Kenichi and his friends fight against a new enemy or getting involved in internal disputes among different martial arts groups. This theme shows how the OC can impact the pre - existing story structure and bring new twists to the narrative.
One popular 'kenichi fanfic' could be 'Kenichi's New Adventure' which might explore new martial arts challenges for Kenichi. Another could be 'Kenichi and the Mysterious Ally' where he teams up with an unexpected character. There are also some fanfics that focus on Kenichi's relationships, like 'Kenichi's Growing Bonds' which delves into his friendships and how they evolve over time.
Often, they highlight the contrast between Kenichi's more naive and determined nature and Shigure's more experienced and mysterious side. Their love is shown as something that bridges these differences.