A complex character who exists both in the imaginary realm as Camilo's idealized lover and in the real world as Marta. Her mysterious persona is a source of fascination for other characters in the narrative.

The owner of the boardinghouse La Madrileña and a maternal figure to Camilo, professing to understand character and maintain order. She is characterized by her engagement in gossip and her role as an unreliable narrator.

A full-time student and another unreliable narrator, who views Camilo with suspicion and often speaks in complex, pretentious language. He is preoccupied with gender roles and has a notable fixation on Camilo.

A retired teacher known for her keen observation and gossip tendencies, which sometimes reveal crucial insights into the unfolding mystery. She is the final unreliable narrator, eager to contribute significance to the investigation.