Catrina is the protagonist of the story and the character for whom the most change occurs. Catrina reluctantly accompanies her sister and parents on the move to Bahía de la Luna, admitting that she feels guilty for being sad about leaving her hometown and her friends behind. She cares deeply for her sister, Maya, wanting the best for her. Cat also feels it is her duty to keep Maya safe: “I’m her sister. I’m supposed to protect her!” (107). Cat is just entering adolescence, and on top of the huge change of moving to a new place that she finds dark and gloomy, she finds herself experiencing rushing emotions, crushes, and conflict between her responsibility to her sister and her desire to be independent. At one point, Cat lies to her friends about Maya, clearly torn between her need to protect her sister and her desire to be her own person. Cat also carries a deep fear of her sister’s death, reacting with panic whenever the possibility or thought of it arises. She starts out skeptical and disbelieving of ghosts, but her doubts are soon disproven, and she has no choice but to believe.