In Greek mythology, Hermes serves as the messenger and guide of the dead, known for his speed and cunning. He facilitates communication between the mortal realm and the underworld, leading souls to Hades after death. As the protector of travelers and merchants, Hermes embodies the themes of transit and transition, highlighting the importance of guidance during life's journeys. His multifaceted role reflects the ancient Greeks' understanding of the afterlife and the significance of navigating the boundaries between different realms.