Rem Nighdrem

Rem Nighdrem is a Nightmare, who debuted in Chapter 69, where she asks Centorea for advice on finding someone to give nightmares to. While she appears shy and says it's normal for her species to cause nightmares in others, her trustworthiness remains skeptical.

Appearance
Rem is a tall woman with dark skin and light hair that is tied at the back of her head in a somewhat disheveled ponytail. She has black rings under her eyes and is wearing a light blouse with long sleeves. She also wears a black dress specially made for the lower body of a Centaur.

As a Nightmare, the most noticeable feature of Rem in her appearence is her headless horse's abdomen and pointy horse ears. Compared to Centorea, Rem has a rather modest bust size, but it is not known whether this is a personal characteristic or a basic characteristic of her subspecies.

Personality
Rem is shy, but also a bit inconsiderate when it comes to other people's feelings. This is seen as she gave Centorea nightmares, not caring that Centorea was already traumatized by the nightmares. In this respect she also seems to be a bit mischievous, since she gave Centorea many nightmares in a row, which was not previously agreed upon. It is not easy to judge if Rem cares much about the inconvenience of the people she gives nightmares to, which makes even Kimihito question whether she's a person to trust.

Rem also seems very proud of her affiliation as Nightmare. When Kimihito suggested solving the problem of finding someone Rem could give nightmares to by simply not doing it, Rem found the idea downright terrifying, since giving nightmares to others is an integral part of the Nightmares' culture and identity.

Skills and Traits

 * Hypnosis: With her pendulum, Rem can use hypnosis to put other people to sleep. As she explains in Chapter 69, this is a learned skill and not a natural skill of the Nightmares. Rem's hypnosis seems to be strong as even Centorea fell asleep almost immediately, although previously she was unsure if that would even work since Centaurs are quite light sleepers,


 * Nightmare Physiology:
 * Taste Buds: As herbivores, Centaurs generally have twice as many taste buds as omnivores (e.g humans), while omnivores have over twenty times as many taste buds as carnivores (e.g Lamia).
 * Normothermia: Like horses, Rem has a higher body temperature than Humans. Her's is 38°C (100.4°F) to be precise, which is the same as the average horse.
 * Centaurs Ears: A Centaur's ears are capable of reflecting the centaur's mood as they are able to move much in the same way as a horse's ears.
 * Cause Nightmares: As a Nightmare, Rem is able to cause other people nightmares and to do that, she is able to read their minds to see what they're afraid of. However, this only works when Rem is in close proximity to a sleeping person and not at a greater distance. If the person is not asleep, Rem can put them to sleep beforehand using hypnosis.
 * Sense of Smell: Due to their equine biology, Centaurs have a sense of smell that is 1000 times greater than that of a human.

Possession

 * Pendulum: Rem has a pendulum which she uses to put other people to sleep through hypnosis.

History
Rem Nighdrem is an exchange student who came to Japan through the Extra Species Exchange Program. During her time in Japan, Rem tried to give sleeping people nightmares, as this is an important aspect of the Nightmare's culture. However, this proved difficult as most people sleep in their houses at night and since Rem would need to be at their bedside to give them nightmares, she could not enter the houses due to trespassing. So her only choice was to look for people sleeping in public places like parks or in front of the station at night. Those chances were rare, however, and after Rem's unsuccessful search for a reliable partner to give nightmares to, she sought the help of Centorea after hearing that she gave advice to other Centaur girls and helped them with their problems.

Plot
Rem makes her debut in Chapter 69 when she goes to the Kurusu house, only to find only Kimihito napping on the patio. Rem then takes the opportunity to give Kimihito a nightmare, although he finds the dream more uncomfortable than scary. Kimihito then wakes up but is very frightened of Rem, whereupon she hastily apologizes while Centorea rushes over, worried if Kimihito is okay.

Rem apologizes again for giving Kimihito a nightmare, although he doesn't understand what she's talking about. Centorea then introduces Kimihito and Rem and explains that Rem is a Nightmare, a Centaur subspecies with the unique ability to give sleeping people nightmares.

Centorea asks Rem for the advice she wants from her, to which Rem explains that she doesn't have enough reliable partners to give nightmares to. Kimihito throws in that she gaves him one a second ago, but Rem explains that such good chances are few and far between since most people live in houses and trespassing is not a option for her. So, Rem has no choice and must look for people who sleep in public places, but even those chances are rare and the constant search for sleepers around the clock has in turn left Rem chronically sleep deprived to her despair. Kimihito doesn't really understand these worries and asks Rem if she even has to give people nightmares and if not, she could just stop. Rem, however, is totally horrified at the idea and say's it not a option, since giving nightmares is part of the Nightmare's identity and raison d'etre. Kimihito reluctantly says he can understand that, although he notes that Rem's expression doesn't exactly inspire confidence.

Zoological Classification
Nightmares are a demihuman subspecies of Centaur that can enter the dreams of sleeping individuals and create nightmares, however if the individual is awake they have to use hypnotism to put them to sleep.

Trivia

 * In their debut chapter Rem is simply called "Nighdrem". In contrast to the other Centaur girls in the Centorea Act (except Cheron), Rem's first name instead of her surname was not revealed before the omake of Volume 17.
 * After Lilith, Rem is the second character in the manga series that can use hypnosis, but in contrast to Lilith, Rem uses a pendulum because her hypnosis is a learned skill and not a natural skill of her species.
 * She considers "thinking about what can cause nightmares" as her hobby.
 * She recently has gained the problem of having a lot of nightmares herself.
 * Her last name is probably a pun on the word, nightdream and the first, REM which stands for rapid eye movement that is associated with sleeping state.