Syrena, portrayed by Àstrid Bergès-Frisbey, is a mermaid captured by Blackbeard's crew, who need a mermaid's tear when they reach the Fountain of Youth.
Syrena, portrayed by Àstrid Bergès-Frisbey, is a mermaid who appears in "On Stranger Tides". She is captured by Blackbeard's crew, who need a mermaid's tear in order to activate the Fountain of Youth.