Megumi belongs to the man-beast race and is Amano Jyaku's sister. She exhibits a highly sexualized nature, frequently described as a nymphomaniac. Her manga portrayal emphasizes malicious, sociopathic traits; she tricks men into sex only to later accuse them of rape or consume them in her monstrous form. After Tatsuo Nagumo rejects her for the human Akemi, Megumi develops a petty rivalry, even attempting to summon a demon to kill Akemi during a beach trip. This contrasts sharply with her anime depictions, where she appears kinder, more empathetic, and lacks the source material's overt antagonism. Her role expands significantly in the anime sequel *Legend of the Demon Womb*. She takes a central narrative position upon developing genuine romantic feelings for Takeaki Kiryū, Tatsuo's human cousin. This emotional attachment marks a profound shift from her typically casual approach to relationships and directly violates her brother's policy against human involvement. Her connection deepens as Takeaki becomes corrupted by the Overfiend's blood and manipulated by the antagonist Faust Münchhausen II, who aims to transform him into a vessel for the ancient evil Kyō-Ō. Megumi actively strives to protect Takeaki and appeal to his remaining humanity during his struggle against demonic transformation. This storyline culminates tragically in a battle atop Shinjuku skyscrapers. With no alternative and under Münchhausen II's influence, Takeaki becomes a direct threat. Megumi is forced to kill him to prevent greater destruction, an act representing profound personal loss and a departure from her earlier carefree persona. Her actions—motivated by love, protection, and ultimate sacrifice—illustrate an arc confronting the consequences of emotional attachment and a painful transition toward understanding loyalty and responsibility. Her supernatural abilities include a potent power linked to her orgasm, capable of projecting visions of the future to foreshadow events. In later sequences, this power manifests violently, depicted as capable of melting bone and neutralizing physical threats like missiles, underscoring her significance within the series' supernatural conflicts.