He has a sense of justice that can be a bit unorthodox at times. In fanfic, this might lead to him bending the rules a little to get the bad guys. But he always has the greater good in mind. He also has a lot of emotional depth, which can be explored when he's dealing with personal losses or when his past traumas are brought to the surface.
A fanfic could focus on Voight's backstory. Maybe he has an old case that resurfaces, and he has to deal with the ghosts of his past while still leading his team. It could show his vulnerability and determination in the face of personal and professional difficulties.
One possible theme could be survival. If they are literally in a cage, they have to find a way to survive against whatever threats are present. Another theme could be trust. Voight and Benson come from different shows ('Chicago PD' and 'Law & Order: SVU' respectively), so the fic could explore how they build trust in this extreme situation.
There are quite a few fanfics out there. One good place to start looking is on fanfiction.net. You might find some stories that really explore the relationship between Voight and his daughter in unique ways, like dealing with the challenges of his job and how it affects their family dynamic.
It could be about a high - stakes situation where Voight and Benson are trapped in a cage. Maybe they're held captive by some criminals they've been chasing, and the fic explores how they use their wits and skills to escape. It might also show their relationship development during this intense situation.
It's interesting because it gives a different view of the Chicago PD world. We see the cases and the police work, but when you focus on Voight's daughter, you get to see how the events in the show impact a family member. It could be about her dealing with the secrecy of her father's job or the loyalty within the police force that her father is a part of. There are so many angles to explore.
One great 'chicago pd fanfic' is 'The Blue Line Bonds'. It delves deep into the relationships between the characters outside of their regular work scenarios. The character development is on point and it gives a fresh perspective on the show's dynamics.
A great character interaction could be between Severide from Chicago Fire and Voight from Chicago PD. Severide's laid - back but confident attitude could clash or complement Voight's tough and no - nonsense approach. They might start off not seeing eye - eye but then come to respect each other as they work towards a common goal, like solving a crime that is related to a fire incident.
The 'roommates' trope can also be found in Chicago PD gay fanfic. Imagine two characters who end up living together for some reason, and as they share a living space, they start to notice things about each other that they hadn't before, leading to a romantic relationship. And of course, the 'secret relationship' trope is popular. Given the nature of their jobs in the show, two male characters might keep their relationship a secret from their colleagues at first.
A third fanfic to check out is 'Hailey's Hidden Past'. This one delves into her past experiences that made her who she is today. It reveals some secrets she has been keeping and how they start to surface during a particularly difficult case. It's a great read for those who want to understand her character more deeply.
Family loyalty is a common theme. The sister might be shown as being very loyal to Ruzek, standing by him through thick and thin in his police work. Another theme could be protection. Ruzek might be protective of his sister, or vice versa, in the face of the dangerous world they live in because of his job.