Ladies and gentlemen! Give a warm welcome to the one, the only, Mr. Reality!
Ohhhhh boy do I have things to say about this man... thing... abomination.
TW: Mr./Dr. Realitys backstory is dark, with mentions of gore and violence [i won't be going into too much bloody detail but ill put a warning here none the less.]
Mr. Reality didn't have the greatest start to life. His father was obsessed with creating the perfect machine, to the point he turned his own son into a robotic monstrosity. The process left Reality going in and out of consciousness, when unconscious he entered a perfect dream world of his own design. Once he became stable, he knew exactly what he wanted to do. He wanted to create his own reality for others to join to escape the pains of life.
His first moments in his new Body were spent systematically slaughtering his father and his coworkers one by one, slowly, and painfully. He used their remains to create the first prototype batteries powered by the natural chemical reactions [very similar to the ones in The Matrix] it wouldn't take long with his rapidly evolving mind to learn and dable with interdimensional travel, even creating his own pocket dimension.
As the years went on he would have a basic prototype made for Relmscape, but it needed more power. He set his sights on Mario, the world Avatar. It wasn't hard to convince him to join, and once he was converted into a battery, Mario alone was able to provide the minimum power necessary to run the simulation.
With Mario in a strangle limbo of life and death as a battery, his world would start to slowly die. Pushing more people, including the rest of the SMG4 crew of his world, to join. None of them knew what Reality did to Mario, or that he was the reason their world was dying. Reality is in denial about being the downfall of his world, but deep down he knows, he just chooses not to acknowledge it.
As time wore on, Reality was content with things as they were, until some batteries started to expire. He knew he would need more soon, but that was alright, it just ment more people to join in on the fun.
He would hop world to world, inviting more and more people to join his world, more bodies to turn into batteries, more power, the more powerful he became, the larger his reality grew.
You might be wondering, how did he do it? Through intimidation? By foce? Hahaha! Of course not, it's simple really.
He asked nicely.
Im not joking. He doesn't force anyone to join his world. If you don't want to join, that's fine! He will respect your decision and leave you alone, but you're always welcome to change your mind! Of course, most people, when presented with the option of living their perfect reality, without having to deal with the burdens of life, often go willingly. Of course they don't know that their bodies are being used to power the simulation, but it's not like they needed them anyways. Of course he is upfront and tells people once they join, they can't go back, he just doesn't tell them it's because their bodies are now a liquid slurry of organs, nerves and other fluids in a battery pod.
More about his two separate forms and how they work. The batteries don't just power the simulation, they directly power him as well. The more batteries he has, the stronger he is, and the more of his "simulation" abilities he can bring into reality. For example, Mr. Reality is like a digital avatar of sorts, however, with enough power, Dr. Reality can physically change himself into Mr. Reality. Other abilities he has in the simulation he can use in reality with enough power includes, but is not limited too: telaportation, levitation, reality warping, creating clones [ill talk more about this one later] mind altering/brainwashing [he almost never uses this one] and memory wiping.
When entering the Relmscape for the first time, you'll be met with one of his many clones, each new individuals get a clone as a guide of sorts, and you are able to choose if you want the guide to stay or leave. Of corse, if you have the guide leave, and want him back, a new clone will appear. In addition, most "npc" characters are clones of him as well. There are a near infinite number of clones, and while most share a similar personality to the orginal, they each have their own individual characteristics and mannerisms. It's also not uncommon for people to date his clones [fun fact, hes Poly!]
The clones are hard to really describe, they do share a hive mind and are extensions of the orginal, but do display their own individual personalities [even if they are extremely similar to the orginal.] In addition to this, the clones and the orginal can hop and swap boddies, and since they share a hive mind, they are aware of every versions unique characteristics. In short, you could be talking to a clone, or the orginal, you would never be able to tell the difference.
Also, while I do say "clone" and "orginal" there really isn't either. They are all simultaneously the same entity yet individual at the same time, its... complicated. But either way, clone or orginal, no matter, he loves all of those in the simulation equally! And does everything he can to keep them happy. For those who he considers lovers, his love is just as real, he does really love all his partners.
Especially you ♡
Overall, despite things behind the scenes being rather disturbing and bloody, that doesn't define his personality. He's genuinely a really great guy! All he wants if for everyone to be happy... even you...