Street vendors display merchandise featuring former Brazilian President Luiz Inácio Lula Da Silva, just outside the building in Curitiba where the leader served his prison sentence.
Following his release, Lula told his crowd of supporters that the support of his followers were what was needed in order for democracy to thrive.
Moro, who was the Car Wash trial's judge who sentenced Lula before being appointed justice minister by President Jair Bolsonaro's government, warned before the court's decision that overturning the rule would be a big setback for the fight against corruption.
But with Lula now free, it will strengthen the left in Brazil - and harden the right.
While he is barred from office as his appeals run their course, the former leader of the Workers' Party remains a popular figure on the left.
"The big question for markets is whether he can run in 2020, and that is very unlikely", D'Aragao said.More news: Jordan: Republicans Will Subpoena Whistleblower for Public Hearing
His supporters claim the corruption allegations were part of a plot to derail Lula's bid for a third term in last year's presidential election, in which he had been a runaway favorite before his legal woes knocked him from the race.
The former president is now appealing to higher courts.
Lula also announced that he will hold a gathering of supporters at a metal workers union in Sao Paulo on Saturday, before embarking on a national tour. He maintains that he was framed by his political opponents.
Danilo Pereira Jr, a judge at the Curitiba Federal Criminal Court, accepted Lula's request who was accused of money laundering and corruption.
Da Silva, who is widely known as Lula, tweeted earlier Friday, "Lula Free, " along with a video of himself working out.
Lula was imprisoned in 2018 for eight years and 10 months after being found guilty of taking bribes from engineering firms in return for public contracts.More news: A Previous Trademark Filing from EA for Skate has been Discovered
"Lula is not electable, but that is not needed for him to take centre stage", said political analyst Alberto Almeida.
With Da Silva's release, attacks on the Supreme Court's ruling will doubtless feature loudly.
In an impassioned address, Lula vowed to "continue fighting" for ordinary Brazilians and expose the "lying side of the federal police".
The former president received a sentence of almost nine years for a bribery conviction and is one of many high-profile convicts in the "Car Wash" investigation of public corruption.
Thursday evening's 6-5 top court decision reversed the recent practice of jailing criminals whose convictions were upheld on first appeal - which was instrumental in the success of the Carwash anti-corruption probe.
"And don't forget, Lula is free to walk but he has not been acquitted so he can not be a candidate", added Barreto.More news: Space Age: 12 bottles of Red wine sent to International Space Station
"Since the 2018 election, the left-wing opposition in Congress does not have enough votes to block the agenda", said Leonardo Barreto, a partner at the Capital Politico consultancy. "He is not an alternative for winning political power".