Keiko is Yusuke's childhood friend. She is a model student: athletic, intelligent, and compassionate. She cares a lot for Yusuke and all her friends. She is also the care taker of Yusuke's spirit beast, Puu. She cares deeply for Yusuke and constantly worries about him.
Yu Yu Hakusho and all associated characters are copyright of Togashi Yoshihiro, Studio Pierrot, Fuji TV, Shounen Jump Weekly, and Shueisha. It's licensed by FUNimation Productions, Ltd. This is simply a fan site to it.