Calypso

In Greek mythology, Calypso (/kəˈlɪpsoʊ/; Greek: Καλυψώ, "she who conceals") was a nymph who lived on the island of Ogygia, where, according to Homer's Odyssey, she detained Odysseus for seven years. She promised Odysseus immortality if he would stay with her, but Odysseus preferred to return home.
However, in world Calypso is met by Adrasteia after she is sent to Ogygia when she burnt Koilos from herself. She is seemingly quite angry at the Gods for the Soulmates Charm and the foreboding meaning it has for her, she also holds some resntment for her father Atlas. Despite this she does not take this out on Adrasteia and seems to genuinely enjoy her company. Though prompted she has yet to elaborate on the nature of her relationship with Odysseus.