She jumps out from under the shade of a nearby tree and scurries toward the bronze statue of the Beatles legend -- all the while fishing for a pair of spectacles in her purse.
She quickly places them on the bridge of Lennon's nose, seconds before the first of the tourists moves in for a picture.
Padrasa has one of the most unusual jobs in Cuba: She's the keeper of Lennon's glasses.
It's a job for which the government pays her 245 Cuban pesos a month, more than what many other Cubans make.
"I've been working here for two years," says the 72-year-old Padrasa.
Now and then
Cuba has had an interesting relationship with Lennon.
In 1964, then-leader Fidel Castro declared a ban on Beatles' music, as part of his war against Western capitalism.
But the band was a mega-act at the time, and smuggled copies of its tunes made it into the island.
"He was very loved in the '70s," Padrasa says. "He was very loved and people listened to his music, but it wasn't allowed."
Fast forward to the time when Lennon became a vocal political dissident, criticizing the U.S. involvement in foreign lands. That endeared him to Castro.
And in 2000 -- on the 20th anniversary of Lennon's shooting death on December 8 -- Cuba unveiled this bronze statue.
It sits on a park bench, long haired and bespectacled.
The pilfering started soon afterward.
Every time the glasses were stolen, the government would replace it. It would disappear again.
Stand by me
About two years ago, Padrasa's own glasses were taken from the Lennon statue. "The glasses were mine," says Padrasa, "but I wasn't watching and when I turned around they were gone."
It took another pair to go missing before the Cuban government hired Pedrasa in her role of guardian of the glasses.
Inscribed in the pavement at the foot of the statue are lyrics from Lennon's "Imagine."
"I've listened to it so many times," Padrasa says.
And then she smiles and begins to hum: "You may say I'm a dreamer, but I'm not the only one."