Aoi no Ue was the first of many Noh plays based on The Tale of Genji.
Lady Rokujo had been married to the crown prince, but his death had left a much less powerful widow.
Genji begins ignoring Rokujo, and in her jealousy her living spirit leaves her body and possesses Lady Aoi, resulting in Aoi's falling sick – the starting-point of the play.
[1] Rokujo initially appears in a sympathetic vein, lamenting the transience of life and beauty: “We are brittle as the leaves of the bashō / As fleeting as foam on the sea...now I wither like the Morning Glory”.
[7] Then, seized with anger, she renews her attack on Aoi, whose deteriorating condition leads to the summoning of the priest/saint and his incantations finally lay Rokujo’s angry spirit to rest.