Mags Flanagan was the winner of the 8th Hunger Games. She was the female tribute in the 75th annual Hunger Games, after volunteering for Annie Cresta.
Katniss notices that Mags mumbles every time she speaks, possibly from a stroke she had prior to the 75th Games. Being from District 4, she has a lot of experience with fishing and net - weaving. She shows her skill with fish hooks in the training centre, as Katniss observes and realises she may be good for an ally, also recalling the reaping tapes - where Mags courageously volunteers in Annie's Place.
Whilst competing in the Quell, Mags is carried by Finnick Odair as she can not walk very fast. Katniss throws a handful of nuts at the force field and she eats a handful. Katniss is worried as she isn't sure if they are poisonous or not, although Mags is fine. She and Finnick begin to weave objects with big sharp blades of grass while Katniss hunts for water and food. When she returns, they have made a hut and bowls. Katniss asks if she can fish with it, but she could not, and is enlightened when they find out it gets water from trees.
Mags died on Day 2. When the poisonous fog was emitted, Finnick carried her while she was sleeping. When the fog damaged Peeta's legs and rendered him unable to walk, Katniss carried Mags as she was unable to help Peeta, but Katniss was also affected by the fog, and Finnick was unable to carry both Peeta and Mags. Realizing that they would be killed by the fog if they could not move faster, Mags kissed Finnick and courageously sacrificed herself by running straight into the fog so Finnick, Katniss, and Peeta could live. Katniss described Mags as "falling to the ground in a horrible dance" when she was dying and Katniss honored Mags for her bravery. When Johanna Mason states that Mags was half of Finnick's family because she was his Mentor, Katniss feels great remorse. Later, it is discovered that Mags was part of an even bigger alliance (including at least 13 tributes) that was set on keeping Peeta and Katniss alive.