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.
Romance can also be a theme, although not always. Some fanfics explore the possibility of a romantic relationship between them, with all the complications that come with it, like trying to balance their personal feelings with their professional duties at the firehouse.
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.
One great fanfic could be about Casey and Dawson working together on a particularly difficult rescue mission. They face many challenges and in the process, their bond deepens. Their teamwork and mutual respect shine through as they save lives.
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.
The plot might involve Dawson being initially scared to tell Casey about the pregnancy. Once she does, Casey has to deal with his own insecurities about being a father. As the pregnancy progresses, they could face criticism from some people in their lives who think they're too young or not ready. But they stay strong together, with Dawson relying on the support of the female firefighters and Casey getting advice from his male colleagues. In the end, they look forward to the birth of their baby with excitement and a bit of nervousness.
Their relationship will likely become more intimate. Casey will be more protective of Dawson, and they'll have to communicate more about their future plans. They'll be more focused on each other and the baby rather than just their own individual lives.
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.
In fanfic about Casey being injured in Chicago Fire, he might face various challenges. Fellow firefighters could rally around him. Maybe they'd struggle to keep the team spirit high while Casey is recovering. For example, Severide might take on extra responsibilities and feel the pressure.
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.
There could be many interesting fanfiction plots around Dawson being pregnant in 'Chicago Fire'. Maybe it could explore how she balances her job at the firehouse with her pregnancy, the support she gets from her colleagues, and the changes it brings to her relationships.