Calypso was an deity of the sea and ruled the ocean. However, before long, she fell in love with the mortal pirate, Davy Jones. In order to please her, he took the duty watch over those who died at sea. However, she never showed up, and it caused Jones so much grief that he cut out his heart and showed the Brethren Court to bind her into her human form.
For years, she had become a human.
After the Dark Curses
Sometime, she meets Evie Turner and her adoptive mother, Emma Swan.