In Greek mythology, the being that remained after Pandora opened her vessel is named Elpis.
Elpis is the personification of hope in Greek mythology. In Hesiod’s Works and Days, the vessel releases troubles into the world, but Elpis remains inside when Pandora replaces the lid. The Greek word and personification are often translated simply as “Hope.”
The ending has prompted centuries of debate. Some readers see hope’s remaining inside as a comfort for humanity, while others argue that hope is another potentially troubling thing kept away from humans. Hesiod does not provide a long explanation of the symbolism.
The familiar phrase “Pandora’s box” comes from later retellings and translations. Hesiod’s original story uses a large storage jar, and the surviving hope is called Elpis, not a generic unnamed feeling.