Some fanfics focus on the challenges they face as individuals and how they support each other through those. For example, Casey dealing with his past traumas and Brett being there for him, or vice versa. There are also stories that explore their friendship evolving into something more romantic, with all the cute and angsty moments that come with it.
Another theme is professional growth. Fanfics might show how they learn from each other and improve their skills as firefighters. For example, Casey might teach Dawson a new technique for handling a certain type of fire, and Dawson could share her insights on dealing with victims.
Their relationship would likely become more intimate and serious. With the pregnancy, they'd have to rely on each other more. They might start having deeper conversations about their future together, like where they'll live and how they'll raise the child.
You can try looking on fanfiction websites such as Archive of Our Own (AO3). There are a large number of fan - created stories there, and you can search specifically for 'Chicago Fire Brett and Casey fanfic'.
One great Brett and Casey fan fiction story could be about them handling a difficult rescue together outside of the normal calls at Firehouse 51. It might explore their growing relationship as they rely on each other's skills during the high - stress situation.
Maybe in the fanfiction, the pregnancy could be a result of a one - time passionate moment between Brett and Casey. As they deal with the news, they start to plan for their future together. Brett might worry about how being a mother will affect her career as a paramedic, while Casey could be thinking about providing a stable home for his new family. Their friends at the firehouse could either be very supportive or there could be some drama among them regarding the situation.
Another theme is the emotional impact on the team. Casey is an important part of the 'Chicago Fire' crew. So when he's hurt, the others might feel guilty, worried, or be in denial. Fanfictions often explore these complex emotions within the team members. They might show how Severide, for instance, tries to be strong for Casey but is secretly very worried. Also, the theme of friendship and support is big. The team comes together to support Casey, whether it's bringing him food during his recovery or just being there to listen to his fears.
Archive of Our Own (AO3) is another great place. It has a well - organized system for finding fan fictions. Just type in 'Brett and Casey' along with 'Chicago Fire' in the search bar, and you'll get a list of relevant stories. The site also allows you to sort by popularity, word count, and other criteria.
One common plotline is Casey's struggle with his physical recovery. He might have to deal with intense pain and rehabilitation. For example, he could be frustrated with his slow progress in getting back to his firefighting duties. Another plotline could involve the emotional impact on his friends and colleagues. They might feel guilty for not being able to protect him better. Also, there could be a romantic sub - plot where his significant other is especially worried and their relationship is tested during his recovery.
One common theme is family expansion. For example, a couple from the show might have a baby, and the fic would explore how they balance their work at the firehouse with their new family life. Another theme could be the support system within the firehouse. When a character has a baby, the other firefighters might step up to help, showing the strong bond among them.
One possibility is that Casey's injury makes him more determined. He could start training secretly while still recovering to prove he can come back stronger. This would show his strong will.