Fujiwara no Michinaga
She was arranged to marry the future Emperor one year after his succession. The Emperor already had an Empress, Fujiwara no Kenshi, who was the daughter of the regent Michinaga and cousin of Seishi. However, Fujiwara no Michinaga had introduced the custom of the Emperor having two Empresses: one called "Chugu", and the other called "Kogo". Fujiwara no Michinaga agreed for Fujiwara no Seishi to be given the title of Empress (as "Kogo"), but he demonstrated that Seishi was to have lover rank than his daughter in practice by making sure that virtually no one attended the ceremony in which Seishi was made Empress. When the courtiers where summoned to the elevation ceremony of the second Empress, they laughed at the messengers and gathered at the appartemens of the Empress Kenshi instead.