Eikoin, whom Kasuga no Tsubone had fervently wanted to join the O-oku, was a daugher of the Rokujo family, a family of waka poets who were associated with the Sanjonishi family.
春日局が強く望んで大奥入りさせられた永光院は、三条西家の同僚の和歌の家である六条家の娘である。