Megumi Amano is a female character from the Urotsukidoji series, appearing as a supporting figure in the original Legend of the Overfiend installments and assuming a more prominent role in later arcs such as Return of the Overfiend, Inferno Road, and the spin-off Shin Choujin Densetsu Urotsukidouji Mataiden. She is the younger sister of Jyaku Amano, a man-beast from the Jujinkai realm, and hails from the same hybrid lineage that exists between the human world and the demon world. Physically, she is an adult woman with short green hair reaching neck length and blue eyes, and she is consistently described as highly sexually confident and aware.

In terms of background, Megumi is a member of the Jujinkai, the race of half-human, half-beast beings who have spent centuries searching for the Chojin, the supreme being prophesied to unite the three realms every three thousand years. Her brother Jyaku is sent to Earth on this mission, and Megumi follows him to assist in the search and to protect the Chojin once he is identified. The manga and anime portray her as a nymphomaniac, driven by a powerful sexual appetite that influences many of her actions and interactions. Her initial motivation is to locate the Chojin and, in some versions of the story, to engage with him sexually, viewing him as an ultimate partner. As the narrative progresses, her motivations become more complex: she develops genuine affection for certain male characters, such as Yuichi Niki in the manga or Takeaki in the anime, and her loyalty shifts from a purely self-serving desire toward protecting those she cares about.

Megumi's role in the story is multifaceted. She serves as a combat ally to her brother, often intervening in battles against demons from the Makai realm. In later installments, she becomes a central figure in resolving conflicts, particularly in Mataiden, where she takes on the role of heroine alongside Takeaki Kiryu. The series frequently refers to her as the strongest female being across all three realms, a statement that underscores her formidable abilities. Her combat style includes a form of sex-based magic that she weaponizes against opponents, a technique that the series later reused in Toshio Maeda's La Blue Girl. She is also depicted as a survivor and a fighter who persists despite enduring brutal and traumatic events, displaying considerable resilience and courage.

Her key relationships include a close but complicated bond with her brother Jyaku, who she supports loyally even when his mission takes dark turns. She also interacts with Akemi Ito, initially as a rival in the manga, and with the Overfiend himself, whom she initially desires but later regards with more caution as his true nature becomes apparent. Over the course of the series, Megumi undergoes development from a one-dimensionally lust-driven character into a more rounded figure with emotional depth, especially in the Mataiden arc, where her characterization gains greater nuance and her motivations become tied to protecting her found family rather than just fulfilling personal cravings. Her notable abilities include superhuman strength and speed consistent with her Jujinkai heritage, mastery of sexual magic that can incapacitate or destroy enemies, and a level of combat skill that places her among the most powerful characters in the series. In the anime continuity, she is shown falling in love with Takeaki and ultimately sacrificing or risking herself for him, marking a significant emotional growth from her earlier, more hedonistic portrayal.