Mockingjay is all about the war and chaos. Katniss is at the center of it, trying to make sense of everything and protect those she loves. The book has lots of twists and turns, and it's a wild ride from start to finish.
In many fanfictions, Prim's location can vary depending on the plot the author creates. Sometimes she might be in a safe haven, while in others she could be in a dangerous situation.
Well, Prim in Hunger Games fanfiction could be anything the author decides. She could have new adventures, face different challenges, or have relationships that weren't shown in the original canon.
A post - Hunger Games plot could be that Katniss and Prim are trying to help the children of District 12 who have been orphaned or traumatized. They start a small school or a healing center. Katniss teaches the kids survival skills, and Prim uses her medical knowledge to help them heal both physically and emotionally. This could also involve some challenges from the Capitol - loyal remnants in the district who don't want things to change.
The Mockingjay novel has themes such as trauma and healing. The characters, especially Katniss, have endured so much trauma from the Hunger Games and the war. Their journey also involves trying to heal from these experiences. And there's the theme of identity. Katniss has to grapple with her identity as the Mockingjay, a symbol of the rebellion, while still being an individual with her own feelings and desires.