Victor of the 68th Hunger Games

Nicoletta was the winner of the 68th Hunger Games, a Victor from District 12, the only one apart from Haymitch. For the past 6 years, she was a mentor, forced to watch kids die. The Games caused problems for her like every other Victor. She thinks this will be continuous and nothing will change, but will these two tributes change what's been going on for 74 years previously?