Liam could also play a supporting role. He looks up to Scott and would be excited about the baby. He could help out with small things like getting baby supplies or running errands for Scott and Lydia. His presence could also add some youthful energy to the story as he tries to understand the changes in Scott's life.
Allison might be a supporting character in some fanfictions, even if she's not alive in the main storyline. Her spirit or memories could influence Scott and Lydia. For example, Lydia might remember Allison's kindness and be inspired to be a great mother. Also, Deaton could be there to provide medical or supernatural advice regarding the pregnancy.
Stiles could be a major supporting character. He would be there for Scott, giving him advice on how to be a good father. He might also crack some jokes to lighten the mood during tense times. Another could be Malia. She could help Lydia with her pregnancy cravings or just be a good friend to talk to.
It would likely become more intense. They'd have a deeper bond due to the shared responsibility of the baby. Scott would probably be more affectionate and caring towards Lydia.
The main characters are clearly Lydia and Aiden. Since it's a pregnant fanfiction, they are likely the couple who are going to experience the journey of pregnancy together.
One possible plot could be their journey of preparing for the baby. They might face challenges like dealing with family reactions. For example, Lydia's parents might have mixed feelings at first. Another plot could be how they balance their relationship while expecting. Scott might be overprotective, which could lead to some cute and also tense moments between them.
Obviously, Scott and Kira are the main characters. Scott is likely to be a protective and caring partner during the pregnancy.
The plot could involve them seeking advice from their friends. Stiles might be the one who gives Scott some practical tips on how to be a father, while Allison could offer Lydia emotional support. They could also have to deal with financial issues, like how to afford things for the baby. Scott might consider getting a part - time job, and Lydia could start thinking about scholarships or other ways to secure their future. And in the end, they welcome their baby into the world with love and hope.
It could be one of the main male characters in One Tree Hill. Maybe Nathan Scott, which would create a really complex family dynamic since he's already part of the Scott family.
The Lightwood parents could also be part of the story. They might initially be hesitant or have concerns about Jace and Clary having a baby so young in the Shadowhunter world, but later come around and offer their support, perhaps in terms of providing a safe haven or sharing their wisdom about raising a Shadowhunter child.
It could be Blair. Blair might be a bit jealous at first but then come around to support Serena. Chuck could also be a supporting character, perhaps providing some advice to Nate from his own experiences in relationships.
Well, Meredith could be a main supporting character. She might offer her own experiences and advice as a friend. Cristina could also be there, providing her unique, no - nonsense perspective on the whole pregnancy thing. Bailey might be another one, being the strict but caring doctor who ensures Izzie has a healthy pregnancy.
One of the main supporting characters could be Bella. As Renesmee's mother, she would likely be very involved in the pregnancy, offering advice and support. Another could be Edward. He might have some concerns about the situation but also be there to help protect the family. Alice could also be a key supporting character, perhaps using her gift to foresee any potential problems during the pregnancy.