The Nightmare's Ambition is to become feared by everyone on the planet, further solidifying its grasp on its inhabitants, becoming able to harvest the collective fears of the entire world, rather than limit itself to singular instances of prey.
It would go as far as it needs to to achieve this. Killing, torturing and manipulating is all part of the game it plays to achieve its goal of, effectively, world domination. It might even consider allowing those who prove useful to live and assist it, if only until it finds itself able to harvest them safely later.
While the Nightmare values its own life very deeply, it understands there are few ways to REALLY kill it, meaning it is willing to go to great lengths to increase its power that would otherwise grow at such an insignificant rate in comparison.
The most defining event in S̶̙͎͍̦̦͎̈́̂̎̐̀͛̓̉̇͒̔͒ą̴̪͎̘̗̈̐̅̋̕l̷̡̡̧̛̻̲͔̩̣̩̰̙͖̙̓̒͐͜ś̴̝t̶̨̢̛͚̹͖͇̺̫̘͍̘̫̑͊͑̐̂̇̌͒̕͝ơ̶̽̂́̆̈̍̀̑͆͘͜n̶͌̾͒ 's "life" was the time it revealed itself to a child in order to attempt to frighten them. It was no real attempt to harvest any meaningful amount of fear, as while the fear a child brings can sate a sort of sweet tooth of the Nightmare's, it isn't very filling. A sort of high, if you would.
But what happened this time was odd. The child didn't scream at all or even seem all that surprised. Don't get me wrong, it wasn't his greatest attempt at instilling terror, not even close, but it still seemed odd.
They were probably not even 3 years old, had black hair, and seemed to have a look about them that, to S̶̙͎͍̦̦͎̈́̂̎̐̀͛̓̉̇͒̔͒ą̴̪͎̘̗̈̐̅̋̕l̷̡̡̧̛̻̲͔̩̣̩̰̙͖̙̓̒͐͜ś̴̝t̶̨̢̛͚̹͖͇̺̫̘͍̘̫̑͊͑̐̂̇̌͒̕͝ơ̶̽̂́̆̈̍̀̑͆͘͜n̶͌̾͒'s surprise, made them rethink their choice to reveal themself to the child.
At the sight of the child's eyes, it felt something, a feeling. It wasn't intense, or even there for long, but it felt it and it did NOT like it. Fear.
Why was it scared of this child? It couldn't possibly do anything to harm it in any way, even if it grew up to become a strong man right then and there.
So why-
That was when it happened. That feeling escalated as the child began crying, and as this happened, the Nightmare felt something else, much more alarming happening. It was being dragged somewhere, pulled and sucked towards the child with an immense pressure. That was impossible! It didn't have a real physical body, so how was-
It had no more time to think as it was getting closer and closer. Once a sliver of it touched the child's skin, it knew what was happening. It was being eaten.
The Nightmare quickly severed the apprehended portion of its body off, which gave it enough time to slink away into a dark alley. As it got farther and farther away, it noticed something.
The child stopped crying, but it heard something despite being nowhere nearby.
"Ra...bby?"
Francis Gronkowski - A 49-year-old man with schizophrenia. He lives alone by himself in his home in Louisiana, paranoia and fear guiding his every move. His house is a deathtrap to all who enter without knowledge of the various piles of magazines and empty food wrappers lying about that serve as deterrents for people to enter, the man not trusting anyone, even government officials or psychiatric professionals. He tells himself that he doesn't believe the monsters exist, but they hurt him all the same. He has long since given up on trying to combat the voices or "delusions" but he is still very cautious and combative towards people, as his delusions appear almost exclusively as monsters in humanoid shape.
Lauren Mills - A kind-faced 29-year-old woman working as Francis's psychologist. She used to come by a lot more often, but now only sees Francis about once at the end of every month. She is very kind and patient with the older man and truly cares for his health. She obviously doesn't believe in any of the delusions the man sees as being true or real, but she is left slightly curious and concerned with the exact details and descriptions of how some of the destruction in the house was done...
Kevin Allen - A bratty 12-year-old who used to be much more snot-nosed than he is now, thanks to S̶̙͎͍̦̦͎̈́̂̎̐̀͛̓̉̇͒̔͒ą̴̪͎̘̗̈̐̅̋̕l̷̡̡̧̛̻̲͔̩̣̩̰̙͖̙̓̒͐͜ś̴̝t̶̨̢̛͚̹͖͇̺̫̘͍̘̫̑͊͑̐̂̇̌͒̕͝ơ̶̽̂́̆̈̍̀̑͆͘͜n̶͌̾͒. The Nightmare still pays the boy some visits every now and then to give him a reminder of the type of fear he will feel if he is seen acting in such an annoying manner. This will probably either force the boy to become competent or give him life-long trauma, and honestly, S̶̙͎͍̦̦͎̈́̂̎̐̀͛̓̉̇͒̔͒ą̴̪͎̘̗̈̐̅̋̕l̷̡̡̧̛̻̲͔̩̣̩̰̙͖̙̓̒͐͜ś̴̝t̶̨̢̛͚̹͖͇̺̫̘͍̘̫̑͊͑̐̂̇̌͒̕͝ơ̶̽̂́̆̈̍̀̑͆͘͜n̶͌̾͒ doesn't care.