Nightmare.

A royal demon, approximately 1.90 meters tall, with very pale, almost white skin.
The face is angular and sharp, with defined cheekbones and a narrow chin.
Her eyes are dark with a reddish glow, slightly sunken,
He has a confident, almost mocking, lopsided smile almost every time.
The ears are pointed, being a demon, and they stand out clearly among the hair.

She has black, abundant, and messy hair, with spiky strands that fall irregularly around her face, a rather dark red.
Two large, sharp horns emerge from the skull, angled backward. They are dark in color with reddish highlights, reflecting its demonic nature.

His build is athletic and well-defined, with muscular arms and firm shoulders.
The chest is partially exposed, showing a strong but stylized anatomy, without exaggeration.
The posture, with arms crossed, reinforces an attitude of security, dominance and control.

She wears a very dark top with irregular, pointed edges, giving the impression that it is made of a torn material.
Around the neck and shoulders, a high collar in a vibrant red with some ripped fabric stands out.
Around her waist she wears a wide, metallic, angular belt that accentuates her silhouette.
A red ribbon or knotted cloth hangs to one side of the hip, adding dynamism and visual contrast.
Also arriving is a type of baggy pants that tie at the ankles, leaving the feet bare; the fabric is slightly torn.

His arms are robust, with shadows that accentuate the musculature.
Extending from the lower part of the body is a thick, long tail, reddish-purple in color, with sharp black spines distributed along its length.

He has a serious, charismatic, and direct personality; being a demon, he didn't exactly grow up in an environment with the values ​​that most people usually have.

His pet is Cerberus.

He can be aggressive, being a demon is a characteristic that they often have, but he always tries as much as possible to control himself; he is vulgar, has a vocabulary full of profanity, dark humor jokes, sarcasm, and things that are not considered good behavior.

Of course he knows how to behave perfectly, he is the prince of hell who is very close to becoming the king of hell, only a few small things are missing for him to be able to be so, but he is usually the type of serious but rude person almost all the time, nobody says anything to him since being in hell it is not bad or irritable behavior.

He has a taste for rock music, something very easy to notice. Being a demon, he feeds on meat or foods that provide protein, or things that are red. He doesn't like sweet food; he prefers bitter and spicy food, although he hardly ever eats since demons need to feed so constantly. But he does like to do it from time to time. He eats like a wild animal since he's not very good at table manners. That's the only thing his father tells him to do—improve his manners—but Nightmare doesn't pay much attention to it.

He has a group of friends called The Exes, a group of .exe versions of people from the earthly world with whom he likes to hang out, whether to chat or cause chaos in different parts of Hell or wherever.

From a young age, he was taught how to behave to be an exemplary king, as well as how to help only those born in Hell, since sinful souls fall into another category. Nightmare was never bothered by the rules of Hell until he started hanging out with his friends, which caused him some problems with his father. But he still secretly visits them and spends time with them. Once he becomes king, he will make some changes in Hell to improve both his life and the lives of those born there, but he knows he won't give everything to the demons on a silver platter; he knows how dangerous that could be.

He has instincts like those of an animal that are reflected by his demonic genes, and he can become very involved in sins such as lust, anger, and pride, since these are the strongest in hell.

Hell is clearly a very harsh and difficult place, especially for sinful souls. Hell is a punishment for sin, where those who committed sins are reminded that everything has consequences, and where they suffer until they simply disappear in misery.

As in every place, there is a social order, and this is also true in hell.
The royal family, demons of the nobility, those born in hell, and finally sinners—it's not as pleasant for those born in hell compared to other kingdoms; there are too many rules for demons in general.

Not being able to have a partner or bond with people or beings from another place.
Not leaving hell for any valid reason.
Bring souls or tributes for the royal family.
To exhibit proper demon behavior.
Do not question any real decision.

Nightmare knows perfectly well that he has broken rules, but since no one has discovered it, he doesn't care. For him, his family matters, but he has a huge hatred for his uncle and cousins, who are truly awful, and he would never want one of them to take positions of power. That is why Nightmare decided to become the new king of Hell.

His father is Lucifer, whom he fears in a way, knowing full well that he can be incredibly cruel and ruthless, even to his own son. This is why Nightmare doesn't take him lightly. His mother, Lilith, the first sinful woman, is kinder than his father, but that doesn't mean she can't be terrifying and cruel, since she wasn't the first woman to sin for nothing. He has a sister and two younger brothers; none of the three can inherit the throne. His sister because she isn't prepared for the position, and his brothers for obvious reasons of age.