Aka Manto (Japanese for Red Cloak) is the story of a handsome young man who somehow ended up as a vengeful soul within toilet blocks in japan (toilet blocks are a common theme within these sorts of myths).
As the story goes, a girl will enter a toilet block to do her business, during which an ominous voice will ask (in Japanese) "Red paper or Blue paper?" (due to the language, the word for paper can often be bastardised into cloak) at which point two rolls of respectively coloured toilet paper appears within the stall of the victim.
If the victim chooses the red paper, the handsome red cloaked man will appear and tear the skin from the victim, seemingly much in the same way Pyramid Head from Silent Hill does in the movie, which will leave the still alive and writhing victim to feel the pain as they are "cloaked" in their own blood. They die by bleeding to death.
Should the victim choose blue paper, they will have the blood drained out of them, either by syringe-like tendrils, or having their feet cut open by the Manto himself. Again, the cause of death is blood loss, albeit far less gruesome than the other option.
If the victim attempts to be clever and chooses a different colour (which is often recorded to be white or green), trying to confuse the Manto, a dark void will open in the floor and white hands will reach up and pull the victim down with them, merging them with the infinite. Cause of death is... black hole?
Supposedly the only way to escape is to sprint out of the toilet block as fast as you can, but depending of the context of the story, this is not always true, as various versions explain the Manto appearing in front of the victim, his large cloak blocking the only exit. Others claim that the world turns hellish for the duration of the ordeal, the cubicle being locked infernally.
Aka Manto is famous for being one of the only Japanese "Vengeful souls" that cannot be tricked, in contrast to Kuchisake Onna, to which a response of "Maybe" will avert your horrible death. With the Manto, as soon as you hear his words, your fate is set, all that is left is to decide how you die.
In the myth, Aka Manto is described to be incredibly handsome, almost princely in appearance, his body shrouded by his trademark cloak, however the story is often twisted with references to a golden mask and hooded cape, due to the above image, which is commonly associated with the story.
InglipInglip isn't a Creepypasta at all. In fact, its just a meme. It began with a captcha image that said "Inglip Summoned" to which a rage comic was made. The comic went viral and the story has since expanded to make a "cult" following the deity known as Inglip. This cult is referred to as the Church of Inglip.
The most significant thing about the church is that Inglip's devout followers, the Gropagas, wear distinct red robes. These robes are identical to the ones described in the Aka Manto story.
Additionally, as the Inglip story has developed, the Gropagas have acquired a select weapon of choice; Seven Falchions. Again, this was in a captcha. As a result, most Gropaga warriors are portrayed wielding Seven Falchions. The complete redundancy of the need for so many razor sharp swords indicates something similar to the requirement for absolute mutilation of the enemy.
Gropagas also have access to magic, which their homeland, Trathira, is full of. Supposedly most Gropagas practice dark magic (this and the red cloaks indicate the "cultist" stylisation). In this sense, their dark magic beams are often blue, and usually involve lighting or otherwise bloodless curses, bearing a faint allusion to the "blue paper" method of the Manto's killing.
Gropagas' skin is paper white. This is because of the face used is the "OMG" Rage face used in rage comics. This paper white skin is much like the skin of the arms that drag the victim down in the "white paper" scenario.
Additionally, in the storyline, Inglip's worst enemies are two other captcha brands, represented by the colours green and white separately, similar to the most common choices of paper colour in the "white paper scenario"
The appearance of Inglip himself is indeterminate. His Gropaga followers wear red, due to the colour scheme of Captcha, but Inglip himself could have any appearance.
Coincidence? Its up to you.