Genkai is a wise and powerful martial artist in the anime series Yu Yu Hakusho. Known as the "Psychic Master," she is revered for her incredible abilities and deep understanding of spiritual energy. Despite her elderly appearance, she is a formidable opponent, capable of defeating much younger and stronger enemies. Genkai serves as a mentor to the series' protagonist, Yusuke Urameshi, training him to harness his spiritual powers. Her guidance and wisdom are crucial in Yusuke's development as a Spirit Detective. Genkai's character embodies wisdom, strength, and sacrifice, often putting herself at risk for the greater good.