Nariko became "nyogo" (a court title given to a consort of the Emperor) as Narihito's togu sakuritsu (formal decision of Crown Prince) took effect, and in the year when Konoe was appointed Emperor, she became Kisainomiya because she was the kokubo (mother of Emperor Konoe); furthermore, on September 13, 1149, she was given an ingo Bifukumon-in, and gained more power than FUJIWARA no Shoshi (Taikenmon-in), whom Cloistered Emperor Toba had earlier decided to formally appoint chugu (Emperor's wife).
躰仁の東宮冊立とともに女御となった得子は、近衛即位の同年、国母であることから皇后宮に立てられ、さらに久安5年（1149年）8月3日(旧暦)、美福門院の院号を宣下され、鳥羽法皇の先立の中宮藤原璋子（待賢門院）を凌ぐ権勢を持つようになる。