Rem

Rem (レム, Remu) is the Shinigami who gives Misa Amane her Death Note. Like Ryuk, Rem possesses two Death Notes; however, Rem did not get hers through trickery. The Shinigami Gelus, who had fallen in love with Misa, sacrificed himself to kill her destined murderer. In doing so he was reduced to dust, leaving only his Death Note. Rem delivered this Death Note to Misa, since it was her life he saved.

Appearance
Rem's appearance is quite skeletal, with long, spinal cord-like arms and bone-like skin. Her features, such as her hair and the markings on her face, are detailed with a light blue shade. The only exception for this is in the anime, where these details are purple. All other media, such as the movies and games, have the details as blue.

In the manga and anime, Rem tells Misa that she is a female Shinigami. In Death Note: The Last Name, this is not mentioned, leaving her gender ambiguous.

Character
While Ryuk takes amusement in everything in the Human World, Rem is almost the exact opposite. She views most humans with contempt. Also, while Ryuk is ambivalent to Light's success or failure, Rem actively assists Misa. This makes her equally as guilty as Ryuk of not displaying 'proper' traits for a Shinigami to have. She is even willing to sacrifice her life to defend Misa, as evidenced by her threat to kill Light should Misa die before her time. For Misa's sake, however, she still assists Light in his schemes.

Death Note 13: How to Read said Rem "supposedly" experiences difficulty while writing the Japanese language.

Takeshi Obata said that Rem is his favorite Shinigami since she is "a good person," even though she is a Shinigami.

Plot
After the Shinigami Gelus gives his life to save a human, Misa Amane, Rem delivers his Death Note to Misa. From that point on, Rem looks after Misa and attempts to keep her from harm. After meeting Light Yagami, Rem becomes aware of Light's intent to use Misa as a tool, and she declares to Light that if his plans should bring any harm to Misa, she will kill him. This ultimately leads to Rem's death, as Light manages to force Rem into killing L for him by presenting a situation in which harm would come to Misa otherwise. By saving Misa's life, Rem dies when she writes L's name.

Film
Main article: Death Note: The Last Name Rem in the film is much like her anime and manga counterpart. She is devoted to Misa and attempts to protect her at any cost, including giving her own life. In the second movie, Rem declares her love for Misa and her contempt for Light moments before her death. While her Death Note is left behind in the manga and anime, in the film, Rem burns her Death Note out of spite, saying that Light will not have it.

Musical
In Death Note: The Musical, Rem's role is very similar to canon, although her character and her feelings for Misa are more developed and central to the narrative.

Rem is introduced in the beginning in the shinigami realm, watching the humans. Ryuk complains that he's bored, and the two of them mock humanity. Ryuk then drops his Death Note into the human world, which startles Rem.

Rem returns at the beginning of Act 2, immediately after Misa picks up a Death Note. Rem explains that Gelus had died saving Misa from the stalker she was running from. Misa asks about Kira because she wants to find him, so Rem explains the trade for the shinigami eyes. However, Rem is reluctant to make the deal because she doesn't think it's worth the sacrifice and Kira is dangerous. Misa insists on the trade, and Rem relents.

When Misa finally meets Light, the meeting does not go happily, and Rem is upset with how things turns out. She laments the situations with Ryuk, who is amused, and Ryuk reminds her not to break the rule about helping humans.

Four days into Misa's confinement, Misa asks Rem to kill her. Rem instead convinces her to give up ownership of the Death Note, which Misa agrees to do although it pains her to lose her memories of her connection to Light. Rem laments that Misa has forgotten her as well.

Rem goes to Light, having already figured out that Light is counting on Rem to sacrifice herself to save Misa by giving L's name to Light. Light tells Rem to write the manner of L's death exactly as he instructs, and Rem does so.

During the ending song "Requiem," Misa symbolically walks out on stage and sand runs from her fingers in a symbol of Rem's remains.

Rem is portrayed by various actresses for the different musical productions. Megumi Hamada (濱田めぐみ, Hamada Megumi) portrayed her in the 2015 Japanese production, and she will reprise the role in 2017. Park Hye-Na (박혜나) portrayed her in both the 2015 and 2017 Korean productions. Carrie Manolakos voiced the character for the New York studio demo recordings.

Rem performs the following songs in the Musical:
 * They're Only Human is a song Rem sings with Ryuk about humanity.
 * A Cruel Dream is a song Rem sings with Misa when they first meet. Misa is devoted to finding Kira even at the risk to herself, but Rem is critical of such emotion.
 * A Cruel Dream Reprise is a song Rem sings with Ryuk, in which Rem's verses now mirror Misa's verses of love from the original song, and Ryuk is the critical one.
 * Foolish Love is Rem's solo song. Rem sings this after Misa loses her memories, and Rem reflects on her feelings for Misa.

Conception
Obata said that when he heard that Rem was female, he decided to create a design contrasting with Ryuk's design, using a white body with "rounder" lines. He says that he used fashion collections to create her motif, describing her resulting appearance as if she wore a "really bizarre suit." He also said that Medusa inspired the design of Rem's head.

Quotes

 * “If you do anything that results in this girls death, the first thing I'll do is write your name in my death note. I will kill you. I'm sure you realize that I can see her life span. If she happens to die before that time, I'll know it was you who killed her. ("Bomb")
 * “Yes, I will die if I act first and kill the person who wants to kill Misa before he makes his move, but... that is fine with me.” ("Bomb")
 * (to Light Yagami) “…if you don't save Misa, I will kill you.” ("Removal")
 * “Humans are such ugly creatures.” ("Eight")
 * “Light Yagami might be as pure as Misa… he was not using the Death Note for himself, but rather he was using the notebook in order to better humanity as a whole.” ("Impertinence")
 * “Light…he can even kill a Shinigami; he has surpassed us.” ("Feelings Within")

Theme
Rem Rem