Benjamin, the terrifyingly composed principal (played by Diego Martín), is running Las Encinas like a fortress. He is hiding his daughter Ari’s secret: she is suffering from severe brain trauma and retrograde amnesia following her near-drowning in the Season 4 finale. She doesn't remember the night of the murder. She doesn't remember her toxic love triangle with Guzmán and Samu. And she certainly doesn't remember that her sister, Mencía, was a high-end escort.