Iris was the personification of the rainbow in Greek mythology, as well as messenger of the gods along with Hermes. She was also known as the goddess of the sea and the sky. She was the daughter of Thaumas and Electra, sister to Arke, Aello, Celaeno and Ocypete. She was married to Zephyrus, the god of the west wind, and had a son, Pothos. It was said that she travelled on the rainbow while carrying divine messages to the mortals. She was depicted carrying a pitcher filled with water from the River Styx, which she gave to anyone who perjured themselves, putting them to sleep.
During the Titanomachy, the war between the Titans and the Olympians, Iris fought on the side of the Olympians, while her twin sister Arke sided with the Titans; both served as messengers. Iris had golden wings, while Arke's irridescent wings were torn by Zeus in the war, who later gave them as a present to Thetis. Thetis, in her turn, gifted them to her son, Achilles, who wore them on his feet.
Iris Is also called Arcus.