Mythology: the Arthurian legend of the Lady of the Lake, as 'it is uncertain whether Morgan and the Lady of the Lake are identical or separate characters' and '[...] the Lady has been retailored to represent the (mostly) nurturing side of the split mother-image, as Morgan has become the (mostly) devouring side. A combination of these split images appears in the figure of Nimue (also called Niniane and Viviane), who first serves as a devourer and then as a restorer of Arthurian males.'

this, too, can be yuri