the Charites were threefold, whether the name is taken to refer to a flower, to the goddesses or to mortal maidens... the story of their disappearance in a well preserved their connection with the deep waters and the Underworld... the Charites are daughters of Night and Erebos, or daughters of Lethe
Kerényi establishes the Charites' essential cosmogonic ambivalence — at once heavenly, floral, and chthonic — through their triple genealogies linking them to Night, Erebos, and the river of forgetting.
, The Gods of the Greeks, 1951thesis