Mikey might be a character created to tell a story about Pop Rocks. He could be a fictional child used to illustrate the appeal or novelty of these candies. For example, he could be a curious and adventurous little boy who wasn't afraid to try new things, like Pop Rocks, which were quite different from other candies at the time.
In many fanfictions, Mikey is the optimist. He looks at the world with a positive outlook and tries to find the good in Rahzar. His friendly nature makes it easier for him to approach Rahzar, even though Rahzar might seem intimidating at first. Rahzar is usually depicted as having a lot of strength and power. He's a force to be reckoned with, but his character can also be complex, with hidden emotions that Mikey helps him uncover.
April and Casey might also be part of this fanfiction. April could use her reporting skills to try and figure out what's going on with Mikey's mutation, and Casey would be ready to fight any new threats that come along because of Mikey's changed state. Also, Splinter, as their sensei, would be guiding them all through this difficult time, providing wisdom and training to help Mikey control his new powers if he has any.
One common plotline could be the OC being a new addition to Toman and catching Sano Manjiro's eye. Maybe they start off as friends, helping each other out in gang fights or dealing with the problems within the gang world. Another could be a more romantic plot where the OC has some sort of special ability or knowledge that Manjiro finds fascinating, leading to a deeper connection between them.
Involve the OC in the world of Sano Manjiro in a natural way. Don't just have her appear out of nowhere. For instance, if she's a new student at their school, show how she gradually gets to know the members of Toman. Let her have her own relationships with other characters besides Manjiro. This way, she becomes a more integral part of the story and seems more believable.
This book was called "Conan: I'm Really Not a Tokyo Ghost Tale." The characters in the book included: male protagonist Sano Shinjiro, male protagonist Kurosawa, male protagonist Kurosawa, male protagonist Kurosawa Claw, male protagonist Kurosawa Yu, male protagonist Amuro, male protagonist Conan, male protagonist Gin, female protagonist Mao Lilan, female protagonist Suzuki Sonoko. This book can be read on Qidian Chinese website.
"Conan: I'm Really Not a Tokyo Ghost Story" Author: Flying in Jianghu is a light novel/derivative doujin novel with elements of transmigration, system style, invincible style, scheming, and comics.
[User recommendation: Daily Brewery, the protagonist should be a fake bar!] Conan Doujinshi is the one that suits my taste the most.
I hope you will like this book.