Miime is a mysterious alien woman with long blue hair who appears in the Harlock Saga as a member of the Nibelung clan, specifically the younger sister of Alberich. She defected from her faction after witnessing her brother's evil actions and was eventually found by Captain Harlock. In this adaptation, her appearance is more human-like compared to her earlier depictions, and her musical instrument of choice becomes a pipe organ, which she uses to control time. She possesses psychic and psionic powers, which allow her to sense the emotions of others and communicate without a visible mouth. She thrives on alcohol, using it as sustenance, and can absorb liquids through the general area of her mouth despite lacking a visible mouth structure.

Her personality is quiet, sensitive, and deeply empathic. She serves as a confidante and trusted companion to Harlock, having pledged her life to him in gratitude for saving her from her doomed homeworld. She is willing to protect him at any cost and often acts as a counselor to the crew, using her empathic nature to soothe pain and anxiety. Although she has no official position on the Arcadia, she assists Doctor Zero in tending to the injured during crises. Her musical talents are also a key part of her role, as her playing can influence the emotions and even the flow of time itself.

Her relationship with Harlock is one of profound mutual respect and understanding, built on shared isolation and loyalty. She is his closest companion and the one he turns to for quiet reflection. Throughout the Harlock Saga, Miime's backstory differs from other versions, tying her directly to the Nibelung mythos, but her core traits of empathy, psychic ability, and unwavering devotion remain consistent. She undergoes little personal change in the series, instead serving as a stabilizing presence and a conduit for the story's more mystical elements.