He is the father of Oigimi (the oldest sister) and Naka no Kimi (the second daughter) of Uji and Ukifune who are the heroines of 'Uji Jujo' (The Ten Quires of Uji), in the later part of the story.
物語終盤、宇治十帖のヒロインである宇治の大君・中の君・浮舟(源氏物語)の父。