There are also fanfictions where Peeta and Katniss develop together in their understanding of the Capitol's true nature. They might join forces with other rebels in a more in - depth way than in the books. Through this, they grow not only as individuals but also as a couple, learning to rely on each other's strengths and support each other's weaknesses while fighting for a greater cause.
Katniss, on the other hand, may develop by becoming more open about her feelings. Fanfiction often explores her internal struggle with emotions, and as she spends more time with Peeta, she might start to express her love and care for him more freely. This is a big change from her guarded self in the original Hunger Games trilogy.