Mags, an eighty-year-old woman, volunteered for the 75th Hunger Games in the place of Annie Cresta, becoming a tribute alongside Finnick Odair, whom she mentored in the 65th Hunger Games and (according to the book and film) practically raised.
Also, Mags was Finnick's mentor, and most likely helped mentor Annie. They would have all lived together in the District 4 Victors' Village. Much like how Katniss, Peeta, and Haymitch became family, it is probable Mags, Annie, and Finnick did as well, so Mags may have felt a maternal kinship towards the younger two.
Mags Flanagan was the female tribute from District 4 during the 75th Hunger Games, for which she volunteered in place of Annie Cresta. She was also the victor of the 11th Hunger Games and the mentor of Finnick Odair.
He loved his mentor, Mags, like family, and had to watch while she sacrificed herself in the arena to save him, Katniss, and Peeta. What's more, Mags had already sacrificed herself just to be in the arena, by taking the place of Annie, the woman Finnick loves. By the end of the Games, Finnick is seriously depressed.
She's half-family, i.e., sorta or partially family, because there's affection but not blood relation. There are literally only 2 people in Finnick's family (Mags and Annie), and Mags is 1 of them.
The Life of Finnick Odair: Hunger Games Explained (From the Books)
Why is Mags mute?
It was also insinuated that the lead heroine believed that Mags previously suffered from a stroke, which would have cleared up her limited communication. Some fans had theorized that PTSD could have been a factor when it came to Mags' lack of talking, or possibly just her old age.
In Mockingjay, it was revealed that President Snow sex trafficked Finnick to wealthy Capitol citizens and if Finnick refused, President Snow would kill somebody he loved. Finnick also cared a lot for his mentor, Mags, who had volunteered to participate in the Games, instead of Annie.
Finnick's death gave even more weight to Katniss's mission to kill Snow, since he was directly responsible for the death of one of her friends - making it all the more poignant when she chooses to kill President Coin (Julianne Moore) instead of getting to personally kill Snow herself.
In the 75th Hunger Games, Finnick Odair from District 4 had a token that was a gold bangle with a flame pattern. This token was first given to Haymitch Abernathy from Effie Trinket as a sign of them being a team. Haymitch gave it to Finnick to tell Katniss to make him an ally, as he could later help her in the games.
The female Morphling, however, appears almost coincidentally, and Peeta even mentions that they don't know her real name. Given that she is willing to make the ultimate sacrifice to protect Peeta, it's safe to assume that the Morphling was committed to the rebel cause.
Catching Fire's Mags Flanagan was District 4's female tribute in the 75th Quarter Quell, along with male tribute, Finnick Odair. At 80-years-old, she was the oldest tribute.
The following year after Lucy Gray Baird's victory, another female tribute emerged as the Hunger Games winner. Mags Flanagan became the first victor from District 4, living off of nuts and her survival skills by creating fishhooks. She was also the first victor to move to Victor's Village before serving as a mentor.
Mags is clearly aware of the plan, as Finnick has included her in their alliance. He watches after her and brings her water from the tree when she is dehydrated and exhausted. However, in order to protect Katniss, Mags sacrifices herself to the poisonous fog so that it wouldn't kill Katniss and Peeta.
At an unknown point in time years before the 74th Hunger Games, she was personally fired by Snow, the stated reason being due to her being too surgically enhanced.
In a way, Finnick has outsmarted Katniss here by saving Peeta's life. Now Katniss "will never stop owing Finnick." He's done her the kind of favor she can't easily pay back; now she can't let him down.
Finnick Odair is the youngest winner in history, winning at just 14 years old. District 2 has the most overall winners, producing "Career Tributes" and having the highest number of victors among all districts. Warning: Spoilers ahead for The Ballad of Songbirds and Snakes!
After winning the games, Snow forced Finnick into prostitution and sold his body to Capitol residents to gain their trust. Finnick only agreed to take part because Snow threatened to torture his loved ones. Even though he bedded several women throughout his time as a victor, Finnick's love for Annie remained true.
Before he rescued Peeta, Katniss saw Finnick as a threat and someone she will eventually have to kill. However, she admits she will never be able to kill him because he saved Peeta. She won't be able to look past the debt she owes him for saving Peeta's life.
Answer and Explanation: Prim is killed by a bomb at the very end of the battle. Alma Coin sees an opportunity to turn the Capitol troops against Snow, and she decides the resulting loss of life from her plan is a worthwhile price to pay.
Annie was a very kind-hearted and forgiving young woman, capturing the heart of fellow victor Finnick Odair, and later voting against President Coin's proposed 76th Hunger Games using Capitol children.
Unknown to most people, President Snow poisoned others but drank the same drink as them to cover up his tracks, resulting in perpetual blood sores in his mouth. The scent of these sores are covered up by the signature white roses he is always seen carrying.
During an interview Katniss and Finnick shot to distract the Capitol from the rescue team, Finnick reveals President Snow kills his enemies and allies who can become threats to him. He also reveals that Snow forced Finnick into sex trafficking, selling his body to wealthy Capitol citizens for high prices.
Finnick tells the scary truth that President Snow prostituted him, under pain of death. He says the only way he got through it was by learning dangerous truths about all the famous and wealthy people he had to have sex with.
