Another option could be to focus on one of their friends from the original story, like Isaac, but from his perspective as he witnesses Hazel's pregnancy. He could have his own growth arc as he tries to be there for his friend during this time, learning about love and responsibility in a new way.
Obviously, Hazel and Augustus could be the main characters. Their love story was central in 'The Fault in Our Stars', and a pregnant fanfic could explore their new chapter as a family. They already had a deep connection, and a pregnancy would add a whole new dimension to their relationship.
A plot could involve the main characters dealing with unexpected challenges during the pregnancy. Maybe there are financial concerns or family issues that surface. It could also show how their friends support them through this new phase of life. They could have different reactions, some being overly excited while others are more cautious, adding drama to the fanfic.
Obviously Ladybug would be one of the main characters as she is the one who is pregnant. Cat Noir would also be a main character as he is her partner and would likely be involved in her pregnancy journey, like helping her and being there for her.
Obviously, Neytiri would be one of the main characters as she is the one who is pregnant. Jake would also be a central figure, as he is Neytiri's partner. Their unborn child could also be considered a main character in a sense, as the whole story revolves around the pregnancy.
The main characters would surely be Owen and Blue. Owen as the human who has a special relationship with Blue, and Blue as the pregnant one. Additionally, there could be some other dinosaurs that Blue interacts with. For example, her mate (if she has one) could be another important character, and their relationship could add more depth to the story of the pregnancy.
Her family members could also be main characters. Her mother or sister, for instance, could be there to offer their wisdom and practical help during the pregnancy. They could be the ones who give her advice on pregnancy - related matters, like what to eat, how to exercise safely, and how to prepare for the baby's arrival.
Leafpool could be a main supporting character. As Squirrelflight's sister, she could offer her medical knowledge and emotional support during the pregnancy. Bramblestar would also be important. As Squirrelflight's mate, he could be there to protect her and help with preparing for the kits.
Obviously, Liza would be the main character. There could also be her best friend, let's say Sarah, who is always there for her during the pregnancy, giving her advice and support. Her mother could also be a character, who might be overbearing at times but means well. And perhaps there's a mysterious neighbor who has some old - fashioned remedies for pregnancy - related issues.
Their friends could include Cisco. He would be super excited for them and might use his engineering skills to create some cool baby gadgets. Iris could also be a great friend, giving Caitlin advice on pregnancy based on her own experiences or knowledge. And then there's Dr. Wells, who could offer his scientific expertise in case there are any complications during the pregnancy.
In addition to Neytiri, her mate would be a crucial main character. Their relationship would be central as they navigate this new phase of life together. There might also be a healer in the clan as a main character. This healer would be responsible for taking care of Neytiri's health during pregnancy, providing herbal remedies and medical knowledge. And perhaps a rival from another clan could be a main character. This rival might see Neytiri's pregnancy as a sign of weakness or a target for some devious plan, adding an element of conflict to the story.
The main character could be a young pregnant woman who has been a die - hard Beckham fan all her life. She could be the center of the story, with her thoughts and experiences during pregnancy being the focus, all while constantly referring back to Beckham's football skills.