There was a theory that stated that she was the sister-in-law of Murasaki Shikibu (the wife of Tokitaka, who was an older brother to her husband, FUJIWARA no Nobutaka), and was the model of MINAMOTO no Naishinosuke, who made an appearance in "The Tale of Genji."
紫式部の義姉（夫藤原宣孝の兄説孝の妻）で、『源氏物語』に登場する源典侍のモデルとの説あり。