Miyasudokoro: Originally, a miyasudokoro was a nyokan in service of the emperor's bedchamber (bedroom) but changed the meaning later to a miyasudokoro who served at emperor's bedroom and elevated to the position of a consort next to koi.
御息所（みやすんどころ）…本来は「御息所」詰めの女官であったが、後に天皇の寝室にも奉仕して更衣に次ぐ地位の配偶者に改められた。