Demon

**Demons** are an ancient race of monstrous, supernatural, immortal beings and the main antagonists of Demonfall Spin-Off.

## Overview

Demons are a mostly carnivorous, vampiric species whose primary diet is humans, consuming their flesh and/or blood. Sunlight is deadly to them and will burn them to ash, so they strictly operate at night. Demons have an abnormally powerful physical constitution and regenerative ability which makes them immune to normal weaponry and grants them the ability to regenerate from any wound with ease, even re-growing their head. Only the Nichirin Swords, special weapons made from special ore with sunlight absorption properties, allowing then to inflict life-threatening wounds on demon kind. Of course, even with a Nichirin Sword, the only method guaranteed to kill a demon is by chopping their head off. They are also known to hate Wisteria flowers which are poisonous to them and whose smell is repudiated by them.

Practically all demons possess a murderous instinct to kill and devour humans, and have lost most of their memories from their human life. While they do still retain their original personality, most times it becomes a darker version of what it used to be. However, there are a few demons who have completely retained their human emotions and memories.

The demon species is also known to mutate and grow stronger over time as they consume more humans, allowing them to grow into more monstrous forms and improve their physical and regenerative abilities among other attributes. Once demons consume enough humans, they can develop **Blood Demon Arts**, an array of supernatural powers and techniques which are unique to each demon. Different human blood types have different levels of nutrition for demons: the rarer the blood type, the greater the nutrition. The rarest blood type is known as **Marechi**; eating a single human with this blood type provides a demon with roughly the same nutrition as eating one hundred ordinary humans.

### Appearance

Demons come in a variety of forms. Most are humanoid in appearance, only with slight alterations to their physiology, including but not limited to: paler skin, fangs, pointed nails, catlike eyes with unusually-colored sclera, dark markings that come in various patterns across their bodies, and/or a change in hair color. The changes differ from demon to demon, as some demons can still retain their normal appearance while others gain distorted features like multiple heads, mouths, or limbs. There are also cases where demons possess bizzare monstrous physiologies more akin to beasts than humans.

### Behaviour

Demons for the most part work in solitude not bothering to group up and are in fact shown to be highly territorial and fight over both prey and potential hunting grounds, the sole exception is the Spider Family, a group of demons forced to work together by their leader Rui in what was a hostile environment. Nonetheless, demons are all for the most part connected to their progenitor, Muzan Kibutsuji, who through an array of curses is able to read their minds, witness what they see, discern their location, and even destroy them remotely, operating akin to a hive-mind. All demons pledge obedience to Muzan, who uses fear and manipulation to maintain loyalty.

## Abilities

**Biological Absorption:** Some demons have displayed the ability to absorb biological matter into their bodies through physical contact, mainly as an alternative method for consumption. It is also implied that demons can kill other demons by absorbing them into their bodies, as Kokushibo absorbed the demons that lost to him in Blood Battles. Muzan also used this ability to nullify a Blood Demon Art that pierced his body.

**Disease Immunity:** Demons have an innate immunity to all types of diseases and ailments, with complex anti-demon drugs and the poison of a Wisteria flower being the only exception, the former being able to effectively weaken demons and the latter able to kill demons if they receive even milligrams of the substance.

**Flesh Manipulation:** All demons have the shared ability which allow them to control and alter their own body's flesh to a certain extent, such as growing limbs, creating identical clones of themselves, and detaching body parts and remotely controlling them.

**Semi-Immortality:** Demons don't age, possessing eternal life that allow them to life for centuries without showing the slightest sign of deterioration or aging. They are unable to be killed by convential means, like suffering excessive injuries, but can be killed by sunlight, through decapitation by Nichirin Swords, Wisteria poison or if Muzan wills it.otely controlling them.

**Unlimited Stamina & Endurance:** All demons have a shared physical trait of endless and limitless stamina and vitality, simply being unable to accumulate fatigue or get tired no matter how hard they try to exert themselves. Demons can also endure pain and discomfort much better than humans and even the likes of Hashira, taking on onslaught of attacks as if they were nothing, such that a severed arm or slashed neck wouldn't even bother them. It is also revealed that demons don't need to sleep.

## Weaknesses

**Sunlight :** The greatest threat to nearly all demons is sunlight, which ignites their cells, severely limits their regeneration, and fatally burns them to ashes. The only demons so far to have developed resistance to sunlight are Nezuko Kamado and Tanjiro Kamado.

**Nichirin Swords:** Nichirin Swords are blades made out of **Scarlet Crimson Iron Sand** and **Scarlet Crimson Ore**, which absorbed sunlight to such an extent that a decapitation strike with such a weapon can instantly kill a demon.

**Wisteria Flowers:** The Wisteria flower is poisonous to demons, and releases a scent that can repel demons. Wisteria flowers can be used to create deadly and highly potent poison mixtures to easily kill demons in small amounts.

**Curse of Kibutsuji:** Every demon created through Muzan's blood is also inflicted with a deadly curse which activates if they call out divulge any information about him, most commonly by saying his name in the presence of Demon Slayers. Demons like Tamayo and Nezuko, however, have freed themselves from the curse.