Dreams play an important role in the narrative, serving as a bridge for characters to reveal their past, work through their trauma, and foresee the future. In Percy’s dreams, he is visited by his Greek friends from his past. He sees his friend Grover, his girlfriend Annabeth, and his brother, Tyson. These dreams serve to connect him to his past relationships and remind him why he is at Camp Jupiter. Even though he is unsure of what they’re saying or why, Percy knows his dreams are important. In one dream, Annabeth asks him to stay where he is, helping him to realize that he can use dreams to communicate with his brother, Tyson. Percy’s dreams serve as a method for him to save the harpy Ella, and to direct his friends to Camp Jupiter.

Hazel’s dreams, or blackouts, force her to work through her past trauma as she relives her role in raising Alcyoneus from the earth for Gaea. She’s able to finally confront her past and process its effect on her life as she takes Frank with her through one of her dreams, where he witnesses her compromise with the Fates.