Katniss the other 24 tributes have to fight to the death and try to survive so that they can make it back home and bring honor to their district.
Defiance absent of Fear
Katniss no longer has the direct fear of the Capital so in the arena so is more open to defy the Capital. One one her greatest moments of defiance is when she decorated Rues body with flowers.
Complicated Love
Katniss continues to try and live her life while Both Gale and Peeta show their love for her.