Chapter Text
It was a myth, a legend, a tale for kids. It was one of the kinds of things the old man from your village said he saw only once in his life.
The legend says that for those who are meant for hell, when Death is going to claim them they are shown the hell that awaits them, and their eyes become violet from the trauma of seeing what the afterlife would be for them.
Up until 1918 nobody really knew if the legends were true, until some soldiers returned home with violet eyes with rings coming from their pupils. It was said that after seeing the hell of war their eyes become tainted and couldn’t go back to their true forms.
Medics and investigators began making theories, publishing papers and making experiments. But their efforts didn’t see sufficient results to explain the phenomena due to the lacking technology of the era.
In 1972 a plane from the Uruguayan Air Force crashed in the middle of the Andes. 16 of the 45 passengers came out alive, but the trauma changed them, the ones who were reported to be the most desperate and traumatized came back with the recognizable trait of the ringed violet eyes. That same year the phenomena was given a name, the Rinnegan.
Now with more people to investigate, scientists and medics had more test subjects to understand the strange eye.
It's purpose? Apparently, scientists found no evidence of anything that helps the survival of the person. No enhanced eyesight, nothing out of the ordinary.
Further investigation in the following years found that the Rinnegan was a recessive trait found in 1/10 people and could only be seen for some seconds in extremely stressful situations, or permanently on survivors of tragedies and traumatized patients.
In a world without chakra nor mana, the Rinnegan would never find its purpose.
Little did humanity know that the first to find the true purpose of the Rinnegan would be a shut-in NEET from Japan who would be trafficked into another world by a Witch.