The nymph who detains Odysseus on Ogygia is Calypso.
In Homer’s Odyssey, Calypso lives on the remote island of Ogygia and keeps Odysseus with her after his shipwreck. She wants him to remain as her husband and even offers the prospect of immortality, but Odysseus longs for Ithaca and his wife, Penelope. The poem presents his stay as lasting seven years.
The gods eventually intervene. Athena reminds Zeus that Odysseus is still prevented from reaching home, so Zeus sends Hermes to order Calypso to release him. Although unhappy with the command, Calypso gives Odysseus tools, timber, food, wine, clothing, and practical help for building a raft. He then sails away toward the next stage of his journey.
Calypso is sometimes confused with Circe, another powerful woman Odysseus encounters. Circe lives on Aeaea and transforms some of his crew into swine; Calypso’s episode instead centers on confinement, longing, and the tension between an alluring immortal life and the mortal hero’s desire to return home. The name Calypso is associated with the Greek verb meaning “to conceal.”