Her colleagues at her firm like Abby, Huck, and Quinn are likely to be involved. They could be her support system, helping her with her work while she's dealing with the pregnancy. Or they could get caught up in the drama that her pregnancy might bring, like having to cover for her more often or deal with the media frenzy that might occur if the pregnancy becomes public.
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.
Another possibility is a deranged fan. If she has a large following, there could be someone who has an unhealthy obsession with her. This person might think that by kidnapping her, they can have her all to themselves and force her to be with them.
Obviously, Octavia herself is the central character. Her brother Bellamy is likely to be involved. He would probably be very protective of her and the unborn child. Clarke might also be part of the story, perhaps providing medical knowledge or just being a friend to Octavia during this time.
Well, obviously Juvia herself is the central character. Her partner would also be very involved. If it's in the context of Fairy Tail, Gray would likely be her partner in the fanfiction, as they have a strong relationship in the original series. Then there are their friends like Lucy, Natsu, and Erza. They would probably be there to support Juvia during her pregnancy, offer advice, or just be there for the big moments.
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 Jules herself is the central character. Her partner, if she has one in the Flashpoint story, would be very involved. They would be there for her during doctor visits, shopping for baby things, and all the emotional moments.
Obviously Lana herself is the central character. Her Pokemon partners are very likely to be involved. For example, Popplio might be constantly by her side, providing emotional support. Ash and his Pikachu could also be part of the story. Ash, being a good friend, would probably offer his help and advice. Misty might also be there, sharing her own experiences or just being a good friend to Lana during this time. Brock could be involved too, perhaps using his knowledge of Pokemon and nature to ensure Lana has a healthy pregnancy. And other trainers from the Pokemon world who are friends with Lana might make appearances to show their support and be part of the story.
Also, any friends that Renesmee has made throughout her life could be involved. They might be there to offer moral support, or there could be some who are jealous or envious of her situation, which could add some drama to the fanfic.
One possible plotline could be Olivia Pope facing the challenges of her pregnancy while still trying to handle the political drama around her. Maybe she has to keep her pregnancy a secret from her enemies to protect herself and the unborn child.
Another character that could be involved is Charlie, Bella's father. His reaction to his daughter being pregnant in the strange world of Eclipse could be a significant part of the story. He might be confused, worried, or try to protect Bella in his own way. Also, some of the werewolf pack members aside from Jacob could also make appearances and contribute to the story based on their relationships with the vampires and Bella.