Kozaisho was a court lady who served Imperial Princess Muneko (Imperial princess of Emperor Toba and an elder sister of Emperor Goshirakawa) and was said to be the most beautiful woman in the court at the time.
小宰相は統子内親王（鳥羽天皇の皇女で後白河天皇の同母姉）の女房で、宮中一の美女とうたわれた。