The hero known for his journey into the underworld in Greek myths is Orpheus. Renowned for his musical talents, he ventures into the Underworld to reclaim his wife, Eurydice, who has died. Armed with his enchanting music, he persuades Hades to allow Eurydice to return with him to the surface. However, the tragic twist occurs when he looks back at her before they reach the light of day, resulting in her permanent return to the underworld. Orpheus's story symbolizes the themes of loss, love, and the consequences of human choices.