But mostly, as she has grown from adolescence to adulthood, she has wanted to leave. Her older sister already lives in Spain. Her best friend went to Miami for a vacation one summer and stayed, telling Rocio about the crowded shopping malls and the impressive facilities at her new school. Most of Rocio’s friends, she said, hope to get out of Cuba as soon as they can.

“My generation, we’re not worried about politics or ideals,” she said. “We just want to get out. Abroad you can achieve so much more. You can be recognized for your work, internationally, by the world.”

Fidel Castro’s era of speeches, ideology and Cold War standoffs is not what today’s ambitious young people want. Like many young Cubans, Rocio mostly wants Cuba to catch up. Why is there no open and affordable access to the internet? Why can’t she easily get on Facebook to say hi to her sister in Barcelona? Why is it so hard to visit the Louvre, in person or virtually?

“I think everyone has a right to get the information they want to think and study,” she said.

She said that the American trade embargo clearly did not help, but that most young people considered their own government responsible for creating a society of limits.

“Fidel and Raúl started out with a good idea,” she said. “They just didn’t achieve what they said they would achieve.”

She wants the same thing her grandfather and Fidel Castro wanted when they were young: radical change and a fair shot at making a life for herself on her terms. The changes of the past few years under Raúl Castro, allowing more private enterprise and travel, offer some hope, she said, “but it’s not changing at the pace it needs to.”

Fidel Castro is gone — “He was a man of the 20th century,” Mr. Montes said in an interview on Saturday night — and his granddaughter has long been ready to move on. “We don’t have time to wait,” she said.