Who was the Roman goddess Proserpina?

Proserpina or Proserpine is an ancient Roman goddess whose cult, myths and mysteries were based on those of Greek Persephone and her mother Demeter, the Greek goddess of grain and agriculture.

The Romans identified Proserpina with their native fertility goddess Libera, daughter of the grain and agriculture goddess Ceres and wife to Liber. In 204 BCE, a new "greek-style" cult to Ceres and Proserpina as "Mother and Maiden" was imported from southern Italy, along with Greek priestesses to serve it, and was installed in Ceres' Temple on Rome's Aventine Hill.