He had become president as a young man and was rumored to have climbed to the top with poison and murder. Snow was also known to use the Panem Hunger Games victors for his profit in several disturbing ways. If citizens did not behave as he wanted, Snow could use their loved ones to force them into submission.
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.
The leader of the Capitol, President Snow is a small man with white hair and snakelike eyes. He smells like blood and roses, which nauseates Katniss. President Snow is a very manipulative, cruel, and ruthless leader who does not care for the people of Panem.
Panem is a dictatorship ruled by President Snow and predicated on authoritarian control. President Snow maintains his control by sowing division among Panem's people—divvying up the country into twelve districts—and ensuring their dependence upon the government.
Later in the series, it is revealed that Snow has bleeding sores on the inside of his mouth, a result of drinking poison in order to trick his enemies into doing the same.
The Life of Coriolanus Snow (UPDATED WITH NEW INFO): Hunger Games Explained
Why did snow become evil?
He eventually, however, did come to love her, but in the end chose to eschew love in exchange for power and ambition. Filled with ideas of control and power from Dr. Volumnia Gaul, he made it his ambition to rule over all, even if people called him an iron-fisted, cruel tyrant.
Snow can't stand to see a young woman betray a young man's affection—his view of what happened 65 years ago. And so he takes out his old, festering wound on Katniss.
Alma Coin was the true villain of The Hunger Games, with Katniss actually seeing her as more of a threat than Coriolanus Snow. At the same time, it was Snow who was made out to be the bad guy in previous movies, making some question why Katniss killed Coin and spared him.
He is motivated by the power he holds over his subjects in Panem, ruling with cunning, treachery, and vindictiveness. Even his appearance is spoiled by the blood that runs out of his mouth from the sores caused by poison he took to make himself appear innocent while poisoning others on his road to absolute power.
Control: As the leader of Panem, President Snow wanted to maintain his power and control over the districts. Katniss became a symbol of rebellion and hope for many people, which threatened Snow's authority.
Snow was 18 during the 10th Hunger Games, making him 8 when the first Hunger Games took place. This means that during the 74th Hunger Games, he was indeed 82 (74+8). So he died at 83 in "The Mockingjay," since that was during the 75th Hunger Games...
Throughout the years, Tigris started to get surgical enhancements, specifically to alter her looks to look somewhat like a tiger getting face and arm tattoos, flattening her nose and getting some of the largest whiskers Katniss had ever seen from a Capitol citizen.
Throughout the four-film "Hunger Games" franchise, which reigned from 2012-15, President Snow (Donald Sutherland) ruled as the personification of pure evil who tries to stop a rebellion inspired by Katniss Everdeen (Jennifer Lawrence).
The woods are now ruined. Katniss decides that the Capitol views her and Gale's weekly hunting trips — and the one time that Gale unexpectedly kissed her, which Snow knows about — as flaunting her defiance in front of the entire district.
Katniss didn't really have the time to consider romance when she was worried about survival. When Peeta and Gale both made their feelings clear, Katniss wasn't entirely receptive despite caring for them both. In the end, her feelings for Peeta and Gale diverged, with Peeta ultimately winning her heart.
However, he did genuinely seem to care about his granddaughter; when she watched Katniss tearfully hugging Peeta in the Hunger Games after Finnick Odair revived him, she said she wanted to love someone that much someday. Snow beamed at her and replied, "And so you shall, my darling. So you shall."
The fact that he escapes death, even just momentarily, gives him a brief sense of getting away with some of what he's done, while his enemy, who he himself has helped turn Katniss against, takes the heavily symbolic arrow. Snow laughs after Katniss killed Coin because he enjoys the irony of the situation.
She was also against the games itself, whilst Snow believed the Districts were below him and continued working to implement new aspects of the games. Their relationship was so undesirable that Snow fired Tigris as a stylist personally.
If I understand your question correctly, and it being why did Snow let those 3 to be rescued from the Capitol, even after their (the Capitol) power and weapons were restored, is because Snow was hoping that District 13 would not know Peeta was hijacked, and Katniss would go to see him and that he would kill her, and ...
Katniss is rendered deaf in one ear after she blows up the Careers' supplies, and she doesn't regain any hearing on her left side until afterwards when the Capitol gives her a hearing aid.
Katniss blamed Gale for the death of Prim. She would never be able to look at him again without thinking of his part in her death. Gale was the best friend he could have been to her at that moment. He knew her so perfectly to understand this, he knew his chance with her had passed.
It is still possible that she genuinely wants to make Panem a better place, but her methods become inhumane. Coin feels threatened by Katniss' rebellious nature. In the end, her own delusional idea of Panem is her undoing, since she ignorantly trusts that Katniss is okay with her being the new president of Panem.
Coriolanus may be convinced that Lucy Gray betrayed him, but his paranoia makes him an unreliable narrator. Ultimately, her true intentions are never confirmed. She may have clued in on his untrustworthiness, but it's also entirely plausible that she had no plans on turning against him.
As Lucy leaves for a brief moment to gather katniss, Snow grows paranoid and believes that she will betray him. In the Ballad of Songbirds and Snakes Lucy story, he starts to hunt her across the lake and the novel amps up his neurosis after he's bitten by a snake under a scarf that Lucy seems to have left behind.
