Aka Manto

The Red Cape (called Aka Manto in japanese) is an entity that supposedly haunts school bathrooms or public bathrooms. It's gender, species, and motives are unknown.

The Legend
While working late in school, after all the students leave, teacher desperately needs to use the restroom badly. He or she goes to the closest one, even though its said to be haunted. While they are doing their business, they notice the toilet paper is all gone. Then, a serial killer wearing a red cloak enters the bathroom. The teacher asks if they can hand them some toilet paper. The figure asks if they want red toilet paper, or blue toilet paper. The teacher responds "red," and the figure gives them regular toilet paper, but proceeds to slit their throat, causing the paper to turn red with their blood.

A few weeks after this, a student is excused from their classroom to use the restroom. He is put in a similar predicament, but this time, they request blue paper. The red cape strangles him until their face and arms turn blue. The next victim is a girl who is also out of toilet paper. When the red cape asks her which color toilet paper she gives a different color. She mysteriously disappeared, and her fate is unknown.

Theories
Several theories exist about the red cape's identity.
 * The most commonly used is that it is a homicidal maniac that targets random people when the bathroom stall runs out of toilet paper.
 * The second most commonly used theory is that it is a ghost or demon that haunts the bathroom for unknown reasons.
 * Continuing this is the idea that the third victim was dragged directly to hell for trying to outsmart the demon.

Trivia

 * It is said that requesting yellow paper will result in the red cape drowning the victim in the toilet.
 * In some versions, instead of strangling the victim, they are exsanguinated, which also causes blue skin.
 * Apparently, the only way to survive the encounter is to decline the use of any toilet paper.
 * In Scream Queens, Denise Hemphill mentions this story while scaring the Chanels.
 * In a comedic twist, she is offered red or blue paper, and mistakes the Red Devil for the red cape.