Iris
Goddess of the Rainbows
Iris was the goddess of the rainbow, the messenger of the Olympian gods. She was often represented as the handmaiden and personal messenger of Hera. Iris was a goddess of sea and sky--her father Thaumas "the wondrous" was a marine-god, and her mother Elektra "the amber" a cloud-nymph. For the coastal-dwelling Greeks, the rainbow's arc was most often seen spanning the distance beteween cloud and sea, and so the goddess was believed to replenish the rain-clouds with water from the sea. Iris had no specific mythology of her own. In myth she appears only as an errand-running messenger and was usually described as a virgin goddess. Her name contains a double meaning, being connected both with iris, "the rainbow," and eiris, "messenger."
Iris appears in ancient Greek vase painting as a beautiful young woman with golden wings, a herald's rod, and sometimes a water-pitcher in her hand. She was usually depicted standing beside Zeus or Hera, sometimes serving nectar from her jug.