It's possible you are thinking of a different book or have misremembered the character's name.
To help you further, could you provide more context about the character you are looking for? For example:
* What is Estrella de Madrigal's role in the story?
* What other characters is she associated with?
* What is the setting of the story?
With more information, I can assist you in finding the character you are looking for.