In addition to the main characters from the show, new characters could be introduced. For example, a new doctor who specializes in high - risk pregnancies if Olivia has some complications. This doctor could become a sort of mentor or friend to her. There could also be a new detective who is brought in to temporarily fill in for Olivia while she's on leave, and this detective could create some interesting dynamics, either being really helpful or causing some jealousy among the team. And of course, family members of Olivia's, like her mother if she's still alive in the fanfiction world, could be important characters as well.
Obviously, Elliot Stabler could be involved. He and Olivia have a long - standing relationship in the show, and he could be a source of support or conflict depending on the story. Fin Tutuola could also be there, as he's her colleague and friend, and might offer some comical or heartwarming moments as he tries to help her out. Captain Cragen could be in the story as well, dealing with how Olivia's pregnancy affects the work environment.
Obviously, Olivia Benson is a main character. She's the one at the center of the story, dealing with the joys and challenges of having a baby. The baby itself is also a key character, though it might not have a fully developed personality yet but still drives a lot of the plot. Sometimes, her colleagues from work might be involved. They could be helping her out or just being there for moral support, like Fin Tutuola or Amanda Rollins.
Obviously, Aria herself is the main character. Her family members like her mother and father could be important characters, offering support or having different opinions. Her best friends would also be likely to be involved, providing emotional support or getting into some friendly arguments about how she should handle the pregnancy.
Obviously, Miss Martian herself is the central character. Her friends and teammates from the superhero group she belongs to could also be involved. For example, Superboy might play a role as a friend or protector. He could be there to support her during difficult times or help keep her and the baby safe from any threats.
The father of the baby would be a key character. It could be a fellow ninja or someone from her past.
The SVU team members like Fin Tutuola and Elliot Stabler are likely to be involved. Fin might use his street - smart skills to track down leads. Elliot, with his deep understanding of Olivia, could be the one who figures out the kidnapper's motives. Also, Captain Cragen would be there to lead the investigation, coordinating resources and making tough decisions.
Maybe some jealous colleagues could be the antagonists. They might not like the special attention Olivia and Elliot are getting due to the baby. So they could start spreading rumors or trying to create problems at work for them, like making false accusations or trying to get them removed from important cases.
Igneel could also play a role. Since Igneel was Natsu's adoptive dragon father, he could appear in Natsu's mind during the transformation, guiding him and giving him advice on how to handle his new dragon powers. And there could be other dragons in the story as well. They might be either friendly or hostile towards Natsu depending on their nature.
There could also be new characters introduced. Maybe other magizoologists from different parts of the wizarding world. They could have different approaches and beliefs about magical creatures. Some might be rivals, trying to outdo Harry in the discovery and study of new species, while others could be mentors, guiding him in the complex world of magizoology.
Obviously Ranma herself. Her father Genma could also be a major character as he has to deal with his daughter's new permanent state. Akane could be there too, and their relationship would likely be very different. Instead of the typical boy - girl rivalry, it could turn into a more complex female - female dynamic.
The Avengers could be involved. Captain America, for instance, might be suspicious of this 'Loki' (who is actually Harry) and keep a close eye on him. Iron Man could use his technology to analyze Harry, thinking he is Loki. And from the Harry Potter universe, Ron could be there, trying to support Harry in this strange situation where he is mistaken for someone else entirely.