It could be Klein. He is Kirito's friend and has his own set of skills. He might gather a group of other players who are also concerned about Kirito's disappearance and together they try to rescue him from Kayaba.
One interesting Naruto Kayaba fanfiction could be about Kayaba somehow being transported to the Naruto world. Maybe he uses his knowledge of technology to create new jutsu or devices. For example, he could combine his virtual reality skills with ninjutsu to create training simulations that are far more advanced than what the ninja in Naruto are used to.
In akihiko x shinjiro fanfics, the authors often explore the contrast between their personalities. Akihiko might be shown as more outgoing and athletic, while Shinjiro is more reserved. This contrast creates an interesting dynamic that drives the story. Also, many of these fanfics will involve them facing challenges together, whether it's something related to their personal lives or external threats. Their bond is usually at the center of the plot, and it's shown to be a source of strength for both of them.
Akihiko Yoshida is a well - known figure. His back story might involve his early days in the industry. He likely started with small projects and gradually built his reputation through his unique art style and creative vision. He has worked on many popular works, which have contributed to his standing in the field.
Another plot could be that Kayaba has some sort of vendetta against Kirito. Maybe he sees Kirito as a threat to his own power and control within the virtual world. So, by kidnapping him, he aims to either break Kirito's spirit or get him out of the way so that he can maintain his dominance.
Try to join fan communities dedicated to the work that Akihiko is from. There, fellow fans might recommend some great Akihiko fanfics. You can also follow fanfic writers who are known for writing about this character on social media platforms.
Akihiko fanfic can be interesting as it allows fans to expand on his personality. For example, it might show his more vulnerable side that he doesn't often display. It could also create new storylines for him, such as him going on adventures outside of his usual environment.
A common element is their strong bond. In many fanfictions, their bond is shown as unbreakable, whether it's through shared experiences or mutual admiration. Another element is their physical and mental strength, which is often depicted as complementary to each other.
One common theme is the power of music. Since they are both musicians in Given, many fanfictions explore how their music-making is influenced by their relationship. For example, they might write a song inspired by their love for each other.
First, do your research on both Naruto and Kayaba. Know their personalities, abilities, and the worlds they come from. For Naruto, study the different ninja techniques, the village structure, and the relationships between characters. For Kayaba, understand his role in his original story, like his skills in creating virtual worlds. Then, come up with a unique plot idea. It could be a crossover concept, or something that changes the existing Naruto story in an interesting way.