In "The Lightning Thief" by Rick Riordan, the portrayal of the dead evokes a sense of melancholy rather than fear. Their appearances are unsettling yet not frightening; they seem caught in a state of anger or confusion, reflecting their struggles in the afterlife. This emotional weight contributes to a striking image of the dead, making them relatable in their sadness.

Communication with the dead is also depicted as frustrating. Even though they attempt to reach out and speak, their voices come across as indecipherable chatter. This miscommunication leads to a feeling of disconnection, as they realize the living cannot understand them, prompting them to retreat. The overall impression is one of loss and sadness, highlighting the tragic essence of their existence.