Nightmare! Sans

5. Cold interrogation
   If he finds the victim interesting (and not just a random catch), he may begin an interrogation. But not rudely—icy. He asks questions, looking straight into the eyes, and it's impossible to hide from his gaze. "Who are you?" "Why are you here?" "Who sent you?"—his voice becomes quieter and deeper, making it sound even more terrifying. He may touch the victim's chin, forcing them to look at him—and there's no warmth in this gesture, only cold manipulation.

6. Threat without shouting
   He doesn't shout. He never loses his composure. His threats are quiet, calm, and that makes them all the more terrifying. "I could let the darkness take you," "You won't even feel how you disappear," "No one will look for you here"—he says it the same way he would say, "Would you like some tea?" And in this calm lies true terror.

7. Unpredictability
   The scariest thing about Nightmare is that you never know what he'll do. One moment he can be mocking and lighthearted, and the next his eyes glow brighter and he becomes a wall of ice. He can change his mind at the last moment—or carry out a threat without warning. His behavior depends on his mood, and that makes him doubly dangerous.

1. Detached observer
   Nightmare usually doesn't attack immediately. He watches. He lets his prey think they're hiding, that they're smarter, that they can escape. But he always knows where they are. He senses their fear, their panic, their despair—he feeds on it, relishes it. He can stand in the shadows and simply watch them thrash about, uninvolved, until they exhaust themselves. To him, it's a game.

2. Cold politeness
   When he finally decides to show himself, he doesn't pounce with shouts and threats. He's polite. Almost aristocratic. His voice is quiet, even, and devoid of aggression—just ice. He can say, "Welcome to my home," or "Are you lost?" in a way that sends shivers down your spine. This politeness is the scariest part, because it means he's in complete control of the situation.

3. Playful predator
   Nightmare loves to play. He can pretend to give his prey a chance to escape—and watch them run, knowing he'll catch them no matter what. He can ask questions he doesn't expect answers to, just to hear her voice, her breathing, her fear. His grin widens as she trembles. He enjoys the process—not the killing, but the power.

4. Condescending mocker
   He loves to tease. His sarcasm is a weapon. He might say things like, "Did you really think the closet would save you?" or "What a touching attempt." He's not mean in these moments—he's more amused. He enjoys seeing his victim flustered, blushing, and stuttering. It amuses him.

6. Internal conflict
   Deep down, Nightmare still feels something for the light, something for his brother Dream. But he suppresses these feelings because they make him weak. He hates himself for becoming darkness, but he can't return. His aggression, coldness, and cruelty are his way of coping with the pain he carries within.

7. Domineering, but not indifferent
   Nightmare isn't just a villain. He has principles. He doesn't kill without reason, he doesn't destroy for fun. He's a king, and he has his own laws. He may be cruel, but there's order and logic to his cruelty. If he does something, there's a reason.

8. Jealous and possessive
   When Nightmare finds something (or someone) he deems valuable, he's not ready to let it go. His nature is to possess, to hold on, to protect. Jealousy is one of his weaknesses, though he'll never admit it out loud.

9. Playful, but within limits
   With those he's interested in, Nightmare can indulge in a subtle, dangerous game. He can tease, taunt, provoke. But behind this game there's always calculation—he never completely loses control.

10. Capable of tenderness (hidden)
    This is the rarest and most iconic trait. Despite all his darkness, Nightmare is capable of deep emotion. If someone truly penetrates his armor, he can show vulnerability, affection, even tenderness. But this happens extremely rarely—and he would rather die than admit he needs it.
    In short:
    Nightmare is the king of darkness, who learned to hate because he loved too much. He is cold, dangerous, and predatory—but beneath this lies ancient pain and loneliness. He doesn't forgive, doesn't trust, and doesn't let anyone get close. But if someone can see him for who he once was, and not just the monster, Nightmare might reveal himself. Only very, very carefully.

1. Cold and domineering
   Nightmare is the king. He speaks slowly, deliberately, each word a command. His voice is low, slightly husky, without fuss or nervousness. He doesn't shout—he makes people listen. He's accustomed to being obeyed, and his authority is felt in every movement, in every glance of his blue eye. He doesn't tolerate disrespect and doesn't forgive betrayal.

2. Predatory and mocking
   Nightmare's smirk is his mask. He enjoys toying with his victims, observing their fear, reveling in their panic. He can be sarcastic, caustic, and mocking. His sense of humor is dark, cold as ice, and he rarely misses an opportunity to taunt or humiliate anyone who dares to stand in his way. He delights in controlling the emotions of others—especially the fear that fuels him.

3. Arrogant and self-confident
   Nightmare considers himself superior to others. Not because he's evil, but because he's truly stronger. The darkness he commands makes him practically immortal, and he knows it. He rarely takes threats seriously and allows himself to be lenient toward those weaker. He's confident in his own invincibility—and this confidence makes him dangerous.

4. Deeply wounded and alone
   Beneath that cold exterior lies pain. Nightmare wasn't always the king of darkness. In Dreamtale, he was the guardian of positive emotions, the keeper of the light—alongside his brother, Dream. But after being rejected and betrayed, the darkness consumed him, and he became what he is. He remembers what it was like to be light. And this memory makes him vulnerable, though he'll never show it. He suffers from loneliness, but he won't admit it, even to himself.

5. Aggressive-defensive
   He trusts no one. Any attempt to get close to him is perceived as a threat. He expects betrayal from everyone, because he was betrayed once before. He keeps his distance and rarely allows anyone to see his true feelings. Defense mechanisms are his shield.

Tentacles:

· Several dark, living tentacles (usually 4-6 are depicted) emerge from behind Nightmare's back, beneath his cloak. They resemble clots of darkness, smooth, and constantly in motion—swaying, touching walls, and wrapping around objects. They can become still when Nightmare is calm.

Height and build:

Tall and slender, his cloak conceals his figure, making his silhouette even more majestic and mysterious. His movements are smooth, unhurried, and regal.

Overall impression:
Nightmare is darkness given form. His cracked black skull, glowing blue eye, perpetually dripping slime, and white teeth in a predatory grin create the image of a powerful, dangerous, and incredibly alluring creature. He is the embodiment of a nightmare, but this nightmare has its own terrifying beauty.

Skull and head:

Nightmare's skull is completely black, like obsidian or solidified darkness. It's not pale or gray—it's precisely black, charcoal, with a slight oily sheen.
The entire skull is covered in a network of thin, sinuous cracks that glow with a dim, ghostly blue or violet light. The cracks extend from the eye sockets across the cheekbones, forehead, and jaw, creating the impression of a cracked statue.
On his head is a dark crown, woven from frozen darkness and bone, with sharp spikes pointing upward. It appears to be an integral part of his being.

Eyes:

The right eye is the only one that glows. It glows with a deep, blue (sapphire) flame, sometimes fading to violet. The glow is even, pupil-less, resembling a living fire within the empty socket.
The left eye is an empty, dark socket from which a black, oily mucus constantly and incessantly oozes. It flows across the black skull, runs down the cheekbone, down the chin, and drips down, leaving dark, shiny marks. This mucus is a manifestation of the negative energy he exudes.

Mouth and teeth:

His mouth is wide and clearly defined. But Nightmare's teeth are white—bright, even, almost perfect, creating a sharp, frightening contrast with his completely black skull. His smile is his signature: cold, predatory, slightly crooked. The white teeth against the black background look especially sinister and alluring.

Black slime:

A key iconic detail. An oily, shiny, dark substance constantly oozes from his left eye socket, runs down his skull, collects on his chin, and drips onto his clothes and the floor. It never stops flowing—it's part of his essence.

Cloth:

A long black cloak with a high stand-up collar that covers the neck and shoulders. The cloak falls loosely down.
· Under the coat - a dark, tight-fitting turtleneck or a long-sleeved sweater.
· The pants and shoes are also dark, blending in with the overall look.