The figure known for his quest for immortality is Gilgamesh, the hero of the ancient Mesopotamian epic. Gilgamesh, a king, embarks on a journey after the death of his friend Enkidu, seeking to discover the secret to eternal life. His adventures lead him through encounters with various mythological figures, including Utnapishtim, who survived a great flood and was granted immortality. Ultimately, Gilgamesh learns that immortality is beyond human reach, leading to themes of acceptance and the legacy one leaves behind. This epic resonates profoundly with explorations of life, death, and the human condition.