peasant girl kills her.

Best part is that happens during the execution of the former leader. Peasant girl is given her iconic bow and arrow to carry out the kill herself during a live broadcast, and instead of going ahead with it, realises le ebil white man wasn't responsible for the sister dying, [which should be noted: the sister being randomly picked for the actual Games at the very start of the story is why the peasant ends up volunteering to do it instead; to protect the very sister "her side" ends up killing for what amounts to war propaganda and virtue signalling], so she turns around and shoots the new woman leader.