HAVANA, Nov 27 (Reuters) - From the Bay of Pigs invasion to a historic visit by President Barack Obama to Havana, Cubans have known for generations that whenever the United States turns its face to Cuba, Fidel Castro would be staring right back.

But the death of "El Comandante" has added to worries among Cubans that U.S. President-elect Donald Trump will slam the door shut on nascent trade and travel ties, undoing two years of detente with the United States under Obama.

Many Cubans believe they could do with their late leader's charisma and way with words to counter Trump's bombast.

RELATED: Global reactions to Castro's death

11 PHOTOS Global reactions to Fidel Castro's death See Gallery Global reactions to Fidel Castro's death A man looks at newspapers' front pages at a kiosk in La Paz on November 26, 2016, the morning after Cuba's historic revolutionary leader Fidel Castro died aged 90. One of the world's longest-serving rulers and modern history's most singular characters, Castro defied 11 US administrations and hundreds of assassination attempts. / AFP / AIZAR RALDES (Photo credit should read AIZAR RALDES/AFP/Getty Images) MOSCOW, RUSSIA - NOVEMBER 26, 2016: Flowers at the Cuban Embassy in Moscow in memory of Cuba's revolutionary leader and former president Fidel Castro. Castro died aged 90 on November 25, 2016. Artyom Geodakyan/TASS (Photo by Artyom Geodakyan\TASS via Getty Images) People watch a TV broadcasting news about the death of Fidel Castro of Cuba at the George F. L. Charles airport in Castries, St. Lucia, November 26, 2016. REUTERS/Carlo Allegri People celebrate after the announcement of the death of Cuban revolutionary leader Fidel Castro, in the Little Havana district of Miami, Florida, U.S. November 26, 2016. REUTERS/Javier Galeano The Cuban flag flies half-mast as police prevent supporters of late Cuban revolutionary leader Fidel Castro from advancing towards anti-Castro demonstrators outside the Cuban Embassy in Madrid, Spain, November 26, 2016. REUTERS/Susana Vera A woman combs her hair as a television set shows the news of the death of Cuba's former President Fidel Castro in Havana, Cuba, November 26, 2016. REUTERS/Stringer EDITORIAL USE ONLY. NO RESALES. NO ARCHIVE People celebrate after the announcement of the death of Cuban revolutionary leader Fidel Castro, in the Little Havana district of Miami, Florida, U.S. November 26, 2016. REUTERS/Javier Galeano MOSCOW, RUSSIA - NOVEMBER 26, 2016: Flowers at the Cuban Embassy in Moscow in memory of Cuba's revolutionary leader and former president Fidel Castro. Castro died aged 90 on November 25, 2016. Artyom Geodakyan/TASS (Photo by Artyom Geodakyan\TASS via Getty Images) People celebrate after the announcement of the death of Cuban revolutionary leader Fidel Castro, in the Little Havana district of Miami, Florida, U.S. November 26, 2016. REUTERS/Javier Galeano MOSCOW, RUSSIA - NOVEMBER 26, 2016: Flowers at the Cuban Embassy in Moscow in memory of Cuba's revolutionary leader and former president Fidel Castro. Castro died aged 90 on November 25, 2016. Artyom Geodakyan/TASS (Photo by Artyom Geodakyan\TASS via Getty Images) MOSCOW, RUSSIA - NOVEMBER 26, 2016: Flowers at the Cuban Embassy in Moscow in memory of Cuba's revolutionary leader and former president Fidel Castro. Castro died aged 90 on November 25, 2016. Artyom Geodakyan/TASS (Photo by Artyom Geodakyan\TASS via Getty Images) Up Next See Gallery Discover More Like This HIDE CAPTION SHOW CAPTION of SEE ALL BACK TO SLIDE

"With 'El Comandante' gone, I am a little fearful of what could happen because of Trump's way of thinking and acting," said Yaneisi Lara, a 36-year-old Havana street vendor and flower seller.

"He could set back and block everything that's been going on, all the things Obama has done. And he did a lot, managing to get the U.S. closer to Cuba," she said, admitting she would consider moving to the United States herself.

Trump has struck a very different tone from Obama, who reached an agreement two years ago with Castro's younger brother, President Raul Castro, to end half a century of hostilities.

Late in his election campaign, Trump sought to reassure Cuban-American voters in Florida that he was firm in his opposition to the Castros, and pledged that, if elected, he would close down the newly re-opened U.S. embassy in Havana.

Earlier on, in the primary contests to pick the Republican presidential nominee, Trump said he thought restoring diplomatic ties with Cuba was fine, but that Obama ought to have cut a better deal.

Now that Trump has won the presidency, it is hard to know exactly what his approach to Cuba will be.

"None of that has been decided," Trump's senior adviser, Kellyanne Conway, said on NBC's "Meet the Press" on Sunday. "The president-elect will make those decisions once he takes office."

However, Reince Priebus, who will be Trump's chief of staff when he takes office on Jan. 20, said Trump would call for more political freedoms from the Cuban government, and that if he did not get this he would roll back Obama's opening.

"There isn't going to be a one-way relationship from the United States to Cuba without some action from the Castro administration," Priebus said on "Fox News Sunday."

After the death of the 90-year-old Fidel Castro on Friday, Obama called him a "singular figure," while Trump described him as a "brutal dictator."

Castro began his career as a revolutionary by toppling a U.S.-backed government, repelled a CIA-backed counter-revolutionary invasion at the Bay of Pigs in 1961, and faced off against President John F. Kennedy in the Cuban missile crisis a year later.

During 49 years in office, he crossed swords with 10 U.S. presidents. And while he took a lower profile after officially retiring in 2008, Castro never stopped warning Cubans that the American government was not to be trusted.

Although moving closer to the United States, Raul Castro has not given up much ground to the Obama administration in terms of liberalizing Cuba's one-party political system.

Obama did not succeed in convincing Congress to lift the United States' tough economic embargo on Cuba, but he personally opposed the sanctions and used executive actions to allow more contact and commerce.

The first U.S. commercial flight to Havana in about half a century is due to arrive on Monday.

'POLAR OPPOSITE'

Trump could easily review such measures. He has included Mauricio Claver-Carone, a leading advocate for maintaining a tough economic embargo, in his transition team.

Without giving any specifics, Trump said on Saturday that his administration would "do all it can" once he takes office to help increase freedom and prosperity for Cuban people after the death of Castro.

"Trump is the polar opposite of Obama," said burly Havana taxi driver Pablo Fernandez Martinez, 39, as he hustled for work.

Life in Cuba remains hard for its educated but underemployed people, but engagement with the United States has brought in more dollars. Martinez fears that could dry up in Trump's administration.

"There will probably be less tourist traffic. That will affect everyone in Cuba, and hit the economy," said Martinez, who earns $100-$120 a week driving for foreigners.

Pedro Machado, 68, is a retired engineer in marine research who now rents out rooms in his airy apartment near Havana's "Malecon" seafront. Watching television with his wife, Machado worried that Trump's angry rhetoric could spell trouble.

"Trump's policies are very aggressive. We'll have to see what he actually does. But it certainly looks like bad news for Latin America and for Cuba in particular," he said.

"My generation benefited from Fidel's revolution, in terms of education, the poor were helped. Not everything was a bed of roses, but Fidel helped us," he added "The United States has acted as an empire, and that's what Trump represents. Given what he has said, the future is not looking great." (Additional reporting by Marc Frank; Writing by Frank Jack Daniel; Editing by Simon Cameron-Moore, Kieran Murray and Frances Kerry)

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