How does Katniss Everdeen's character develop in Catching Fire?

The beginning of Catching Fire shows Katniss attempting to adjust to life after winning the Hunger Games. Early in the book, Katniss feels lost and uncertain, and craves a return to her simpler early life and the security of not being hated by the Capitol. As the book progresses, Katniss begins to embrace her role as a symbol of resistance against the Capitol. After witnessing the brutal treatment of the other districts, the increasing military presence in her own, and the violent punishment Gale experiences, her resolve against the Capitol is strengthened. The main character development experienced by Katniss in the book is the transition from her fear, uncertainty, and regret in the early chapters of the book to her increasing resolve and determination to fulfill her reputation as a rebel against the Capitol.