Bernardo Calvera was a Human male of the 21st century in San Francisco on Earth. Calvera was one of several employees of the Sanctuary District A that were taken hostage during the Bell Riots of 2024.
Calvera was a District Security guard in the District and the partner of Vin. Despite his partner's objections Calvera cooperated with the hostage-takers because of his strong desire to return home to his wife Sonya and children. (DS9: "Past Tense, Part I", "Past Tense, Part II")