She clearly loved Finnick and Annie, as it was noted she basically raised Finnick, having mentored him and likely Annie as well. She made easy friends with Katniss, who admired the old woman for her bravery and selflessness.
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.
Chia Mags kisses Finnick on the mouth to briefly let him know that this is the last time she will see him. It's her way of saying "Goodbye" but in a more affectionate way.
During the interview with Caesar Flickerman, Finnick recited a poem for his one true love, Annie, although he did not mention her by name. During the third Quarter Quell, he heard Annie's screams during the jabberjay attack, and worried that the Capitol had tortured her.
Finnick couldn't carry both Peeta and Mags, so Mags heroically sacrificed herself by walking into the poisonous fog to allow the group to move at a faster pace. It was later revealed Mags was part of a bigger alliance to ensure Katniss and Peeta's survival.
The Life of Finnick Odair: Hunger Games Explained (From the Books)
Did Finnick love Mags or Annie?
Shortly after, we see that the tribute accompanying him from District 4, his former mentor Mags (the late Lynn Cohen), volunteered to protect him and Annie Cresta (Stef Dawson) — the love of Finnick's life.
(Katniss recognizes her because she was also in the forest outside District 12 when the girl was captured, and she feels guilty that she did nothing to help.) As punishment, the Capitol cut out the girl's tongue and then forced her into a life of servitude as an Avox.
Katniss is unfazed by his flirting, and admits that while he is attractive, she has never been drawn to him. At first, Finnick appears to be another shallow puppet of the Capitol's. She says that she's never been attracted to him and that is possibly because she has found him too easy to lose.
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.
The films, trying to be as faithful to the source material as possible, naturally had to include Finnick's death as well. In this sense, Finnick is the perfect candidate for upping the stakes of the plot via his death, as his hope for a future with his partner Annie made his demise seem even more untimely.
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 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.
It's a horrifying death, though Katniss puts him out of his misery when she sets off an explosion in the sewer to free him of his pain. At the time of Finnick's death, he was either only 24 or 25, making The Hunger Games loss even more devastating.
After winning the games, Finnick was forced into prostitution by President Snow. He was blackmailed into going out with wealthy citizens of the Capitol for the safety of his loved ones, such as his District 4 sweetheart and fellow victor Annie Cresta (Stef Dawson).
He is still holding up the efforts to run away from the fog, so Finnick carries Peeta and Katniss takes Mags. But the strenuous effort of running and the effects of the fog on her nerves make it impossible for Katniss to carry Mags.
In Suzanne Collins's books, Finnick, a previous victor brought back for a special all-stars Hunger Games, is described as extremely handsome — so much so that he's been pimped out in his post-victory life as a courtesan to the women and men of the Capitol.
Finnick Odair was a male victor from District 4 and the winner of the 65th Hunger Games, making him the youngest Victor ever. Ten years later, he was reaped into the Third Quarter Quell, of which he was one of the survivors.
Katniss often goes to Finnick for advice, wondering how he keeps from breaking down knowing that the Capitol could be torturing Annie. He ties knots in a rope to keep his hands busy and shares this practice with Katniss and, later, Peeta.
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!
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.
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.
He creates Katniss' outfit of black cloth covered in fake flames, which gives her the nickname "girl on fire," and encourages Katniss by telling her that he thinks she'll be the winner of the Games, providing crucial morale for her before she enters the arena.
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.
Early on in Catching Fire, it was made clear that Mags didn't talk, and instead, she used hand gestures to communicate. Interestingly enough, her inability to speak was never directly explained in the movies. The book, on the other hand, insinuated that it was due to a medical condition.
Peeta used the dyes to paint a picture of Rue after Katniss covered her with flowers when she died. He says he wants to hold them accountable for killing Rue, and Effie tells him that that kind of thinking is forbidden. Katniss then tells the team she hung a dummy of Seneca Crane.
