In the early chapters of the Yu Yu Hakusho manga, Keiko Yukimura is often seen in the company of two female friends who serve as a background presence in her school life. These two girls are classmates who accompany Keiko, providing a sense of her everyday social circle at Sarayashiki Junior High. One of these friends, a girl with black hair and glasses, is named Natsuko. The other friend, who has blonde hair, is not given a name in the source material. Their primary role is limited to these early sections of the story, acting as a small part of Keiko's normal world before the narrative focuses more heavily on the supernatural elements surrounding Yusuke Urameshi. Information regarding their individual personalities, motivations, development throughout the series, or any notable abilities has not been documented. Their key relationship is simply that of friends and classmates to Keiko.