She became Kiyomori's concubine at his request and gave birth to a girl (Lady Ro; a member of the Taira family) (the story of Tokiwa becoming Kiyomori's concubine is taken from "Heiji Monogatari" and "Heike Monogatari" (The Tale of Heike), which are both war stories; see below).
清盛に請われて妾となり、一女（廊御方(平家)）を産んだ（常盤御前が清盛の妾になった話は軍記物語の『平治物語』『平家物語』などによる。後述）。