In a faraway future, Romanius the 3rd who also goes by the name Roman(for simplicity, "Ruppet" for the rest of this page), had an interesting life.
He was the son of the latest "World President"(a title given to people, who manage and control all worlds in the universe), got interested in "Dark Magic"(prohibited magic, that can even make robots use magic), became "World President" at the age of 30, got married to a beautiful woman, and has born a daughter which was considered a child prodigy.
On the morning of July 15th 5638, a month before his 40th birthday, he awoke to find his family missing.
In the news, they've reported an accident of some kids from the biggest magic school on Earth practicing magic but accidentally killing two civilians...
Out of rage, he used Dark Magic and gave his robot army the command to "kill all of humanity".
Weeks later, 70% of humanity got killed and a teacher, of that school, confronted him to end it.
After a long magic fight, the magic teacher had the upper hand and sealed him into a mask, that then should've banned him to one dimension.
However, he countered the spell and changed it from "banned to one dimension" to "banned to ALL dimensions".
After landing in every dimension, all masks had now one goal: Destroying the original dimension and every other too
After billions of years, changing owner, switching through dimensions, and getting more enraged, Ruppet landed in to the hands of a losing fast food franchise owner(in the following simplified to "Owner").
After having a lot of hallucinations, the owner decided to wear Ruppets mask and got teleported to a new dimension, where his franchise survived and is also well known.
However, Ruppet had his own little plan.
One night, Ruppet decided to create masks with different paintings, that should look like his own.
But he didn't exactly know, how the paintings on his mask looks like so he needed test subjects to try them out...
And what would be better, then little children in his restaurant?
So, 11 children went "missing" and the animatronics, of the main restaurant and its subsidiary, had a foul odor.
And Ruppet was not pleased with the results.
30 years after the children got missing, a horror attraction got build with a spare suit, that was meant either for the employees to be used or to put an animatronic inside, for the scares.
Ruppet applied as the phone guy but was curious about the suit...
Especially after the sudden foul smell inside.
Not long after that, it turned out that the suit was used by a "fused animatronic endoskeleton and a human" which gave Ruppet an interesting idea.
40 years after the "missing children incident", Ruppet was annoyed of his downstairs neighbor watching TV at night.
To "teach them a lesson" he decided to build horrifying animatronics, that should scare them to death.
What he didn't know is, that it was the son of his neighbors that watched at night.
After five terrifying nights, he got his peace and the nightly disturbances stopped...
20 years later, an investigation started to finally find out what caused the "MCI".
The team leader, who had to endure five nights of robotic terror, got information on who was responsible for the incident and went to all locations of "Roman Mazebear Entertainment" to end up at his old family house, where Ruppet was waiting.
After a "fight", the Owner put down the mask to reveal that he was the killer, he came from another dimension, and that he was the "leaders parallel self".
Right after this confession, the owner disintegrated to dust.
The mask, the owner wore, was put into the local museum but got stolen by a thief.
Of course, out of curiosity , he put on the mask and teleported to a new dimension.
He stood in front of a restaurant, which holds a factory where "RME" built their animatronics.
Ruppet was intrigued and continued with his previous plan.
One young girl, a joyful boy, and a young ballerina.... they all ended up in the new "Karakuri Animatronics".
However, the latest victim was too interested in Ruppets mask and ripped it off his face...
The little girl went around the factory and ended up in front of "Karakuri Miku", the animatronic with Ruppets first victim of the dimension, and out of anger got "scooped" by the animatronic...but put the mask on in the last few seconds of her life
Because Ruppet had somehow foreseen this, instead of getting crushed by the animatronic he turned himself into a program, then into a virus, and then infected all the animatronics and machinery.
He was back in a new body, he constructed himself but was stuck for the other security measure... "No vessel is allowed to leave this place without any human consent".
So, Ruppet sent out a job application for a "night-shift mechanic" and got a hit.
Five nights of leading them around.
Five Nights of robotic terror again...
And just one big scoop for a new appearance.
After he crawled into that lifeless body, he finally saw the paintings on his previous form...
He mass-produced the mask, added his "virus-self" into them, and planned his world domination for "A beautiful curtain call of this dimension".
About a year later, he finally created a portal (with the help of his possessed victims) and left the dimension.
Ruppet landed in a cartoonish looking place, haunted by ink beings.
he located the machine, that created those beings and dropped his "emergency mask" into it.
The ink machine produces the so-called "Ink Demon", based on the studios character "Bendy", and it was in Ruppets full control.
The Ink Demon terrorized his previous maker but before Henry destroyed him, he got greeted by Ruppet.
Ruppet used him to create a new portal, but Bendy stopped him shortly for a promise.
"Hold on to this paper with the ink splatter. It will be the gateway of your destination and my home." Bendy said to Ruppet.
After jumping through the portal, Ruppet landed inside a video game and nearly got deleted by the "club president", Monika.
However, Ruppet quickly infected her and took over her body.
After some terrorizing of the player, he created another portal and landed on Earth...
An Earth, protected by the "Gods Heart"
Now, there're multiple Ruppets who have the same goal but are stuck with an obstacle..
One is still trapped in the RME factory...
One tries to get rid of the "R-Force"...
One, who has to atone for "his sins"...
And one is trapped inside a mod of the same video game...
No one knows, when they all meet.
No one knows, if they will ever meet.
And no one knows, if the person next to you is actually one of the infinite Ruppets.
All these rules also apply, when Ruppet just creates a portal to a dimension but someone else goes through it