Megumi Kisaragi

Black Jack's tragic love, they met during their internship. She stayed up late at work and cared more about the patients than everyone else. She discovers that Kuro Hazama has been the one looking after her whenever she walks alone at night. Later, she reveals to have ovarian cancer, and is afraid to tell Black Jack because of her fear that having these parts removed will interfere with their relationship. Nevertheless, the couple confess their love before the operation while Megumi is "still a woman" Afterwards, Megumi changed her name to Kei, a male name, and started living her life as a man, treating sick patients as a ship's doctor.