Rem is a Shinigami who intervenes in human matters after delivering Gelus's Death Note to Misa Amane. Gelus sacrificed his existence to save Misa from a destined murderer, dissolving into dust. Rem retrieved the notebook and gave it to Misa, becoming her guardian. Physically, Rem possesses a skeletal form with elongated, spinal cord-like arms and bone-textured skin. Her design includes light-blue or purplish facial markings and hair, varying by adaptation, along with pale retractable wings. She is explicitly female in the manga and anime, while the live-action film *Death Note: The Last Name* leaves her gender unstated. Unlike the apathetic Shinigami Ryuk, Rem holds contempt for most humans yet develops intense, selfless loyalty to Misa. This devotion compels her to threaten Light Yagami should Misa die early and to actively aid Light's plans solely for Misa's benefit. Her protective empathy defies typical Shinigami traits, described by creator Takeshi Obata as making her "a good person" despite her nature. Her involvement intensifies when detective L detains Misa. Rem convinces Misa to relinquish her Death Note ownership, erasing Misa's memories to shield her. Later, manipulated by Light, Rem kills L and Watari by writing their names in the Death Note. Knowing this act—killing to extend a human's life (Misa's)—would trigger her own disintegration, she dissolves into dust. Across other media, Rem's role differs: - *Death Note: The Musical* emphasizes her emotional connection to Misa through solos like "When Love Comes," depicting internal conflict. - The 2015 TV drama adaptation removes the compulsion for self-sacrifice, allowing her survival. - In *Death Note: The Last Name*, she explicitly declares love for Misa before death and burns her Death Note to prevent Light from obtaining it. Her character remains defined by the paradox of a death god who prioritized a human's life over her own existence.