Devil Physiology (Chainsaw Man)

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Devils & Fiends=
==Summary==
 are creatures born in Hell, out of concepts stemming from humanity, within the universe of Chainsaw Man. Generally devils have an instinctive desire to despise humansChainsaw Man Chapter 5Chainsaw Man Chapter 11Chainsaw Man Chapter 41, enjoy killingChainsaw Man Chapter 149, and blood-thirstyChainsaw Man Chapter 14; as blood is a source of power and nutrition for them. However, they are rare expectations to this such as the Fox DevilChainsaw Man Chapter 20 and those with a more human-like appearance tend to be more docile & benevolent towards humansChainsaw Man Chapter 34, e.g. the Angel Devil. Moreover, devils that can properly speak are considered "pretty strong" to Civilian Devil HuntersChainsaw Man Chapter 45.
A special class of devils known as the are devils that have likely existed when humans first came to be, embodying the most instinctual fears ingrained within the human psyche. These devils have been described as "transcendent" compared normal devils and have never experienced death before due to their immerse powerChainsaw Man Chapter 64.
==Abilities==
=== Innate Abilities===
While the physiology and abilities of devils vary from one to another, typically linked to the concept they embody, devils have been shown or stated to innately possess these fundamental abilities: 
*Abstract Existence (Type 2; All devils are born from a "name" - concepts derived from humanity fears that the devil embodiesChainsaw Man Chapter 6. These concepts can range anywhere from highly tangible such as guns & spiders to highly abstract such as control & violence) 
** Immortality (Types 1, 3, 4, 6 and 8; As devils are the conceptual embodiment of humanity's fears, they will continue to persist after death as long as the concept they embody continues to be feared by humans. Whenever they do get killed within the human world; they will resurrect in HellChainsaw Man Chapter 53 under a completely new formChainsaw Man Chapter 91, and vice versa. Devils are also able of possessing human corpses when threatened with deathChainsaw Man Chapter 1)
*Empowerment (Devils can gain strength and boosts in the effectiveness of their abilities through the below) 
** Through Fear (One core trait of devils that has been repeatedly stated throughout the series is that; the more feared the concept that the devil embodies, the more powerful they becomeChainsaw Man Chapter 13Chainsaw Man Chapter 15Chainsaw Man Chapter 19Chainsaw Man Chapter 73Chainsaw Man Chapter 98Chainsaw Man Chapter 99Chainsaw Man Chapter 135Chainsaw Man Chapter 146. This doesn't just mean fearing the concept itself, fearing mental imagery related to the concept also counts. For example, a person may not fear a car by itself but fearing being run over and dying by a car would still count, and hence empower the Car Devil)
**Through Devil Consumption (Devils can also enhance their power, regardless of what type of devil they are by consuming pieces of flesh from strong devils who are feared. For example, the various weaker devils that had consumed small pieces of the Gun Devil had grown to be considered "too strong" for their caliber) 
***Limited Power Modification (Aside from boosting physical abilities through both methods of empowerment, the effectiveness of the devil's abilities can also be boosted. For example, the War Devil no longer needed to touch objects in order to change them into weapons after an increased in fear for warsChainsaw Man Chapter 148)
***Limited Transformation (Fiends can revive as devils after eating pieces of strong devils as shown by Power's transformation into the Blood Devil after consuming a part of the Chainsaw Devil while she was in Denji's bloodstream)
*Regeneration via Limited Blood Manipulation (Varies from Low to Low-Mid normally; Devils can recover by drinking bloodChainsaw Man Chapter 30. However, their regeneration is entirely dependent on the amount of blood they consume. It has been shown that blood has helped devils regenerate from snapped necks all the way to entire lost limbs from relative low amounts of blood; less than what a human needs in themselves to stay conscious. Up to High-Mid; Stronger devils such as the Chainsaw Devil have been shown to regenerate from just their hearts without external blood consumptionChainsaw Man Chapter 88)
*Enhanced Senses (Stated to possess keener noses than humansChainsaw Man Chapter 55. Have also been shown to be able to distinguish the scent of Hell from the human world and sense when a powerful devil such as the Darkness Devil is watching them when in Hell)
*Physical Possession (Devils can possess human corpses as a mean to survive), Those who have are called: 
** A are devils who takes over a human corpses, distinguished by their distinct head shapesChainsaw Man Chapter 4. Very few fiends can repress their homicidal urgesChainsaw Man Chapter 21, most likely due to most of them lacking most of the human brain of the person they possess, those who don't can recall memories from the person they took overChainsaw Man Chapter 56. Fiends are much weaker in both power and the effectiveness of their abilities however possess all the same innate abilities of devils expect for the ability to create contracts with devilsChainsaw Man Chapter 17 and further possession.
===Contract Creation===
 are a form of verbal binding vow between a devil and a human which cannot be broken without the death of the party that breaks the contract. These contracts can take place in the physical world or the mental space of the human that's being contracted (Limited Selective Telepathy). Interestingly, those that possess authority have been shown to be able to make contracts using the humans they have authority over, even when they haven't voiced consent or knowledge into the matterChainsaw Man Chapter 75. As contracts will be carried out regardless of volition depending on the nature of the contract, they fall under Law Manipulation.
General abilities that have been shown to come out of contracts include: 
*Power Bestowal (Devil can lend their power to humans; whether it be in part or in wholeChainsaw Man Chapter 25)
*Summoning (Humans can make contracts with devils to summon parts of them when in battleChainsaw Man Chapter 10)
*Transformation (Humans can transform into "devils" themselves through contractsChainsaw Man Chapter 144)
*Fusionism & Resurrection (Devils can fuse with humans, turning them into hybrids and resurrecting them from death)
==Resistances==
Devils and fiends have also shown to possess innate resistances to the effects of other devils due to their general physiology, these resistances include: 
*Zombification & Corruption (Type 1; Devils are able to resist the effects of the Zombie Devil and its zombies which will turn any human that they bite into more zombiesChainsaw Man Chapter 32 due to being non-humanChainsaw Man Chapter 90)
*Dollification (Similarly, devils are able to resist the effects of the Doll Devil which can turn any human that it touches into dolls, even if touches just their clothes due to being non-humanChainsaw Man Chapter 59)
==Weaknesses==
When a devil dies, their power becomes undone unless it's transforming others into devils. Moreover, as devils primarily use blood as a source of fuel, they can lose their ability to regenerate should they run out of blood. Also, they can be debilitated when humanity begins to lose their fear of themChainsaw Man Chapter 89 or the respective concepts which they embodyChainsaw Man Chapter 104. The Japanese government even has a system that has people report anyone inciting fear after large attacks to prevent the strengthening of devilsChainsaw Man Chapter 132. 
==References==
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Hybrids=
==Summary==
Hybrids, also referred to as a , are a special type of species within the universe of Chainsaw Man, being neither human or devilChainsaw Man Chapter 23 but rather a fusion of them both which can occur through either a contract between the two partiesChainsaw Man Chapter 1 or physical surgery; replacing a human's organ with the devil in questionChainsaw Man Chapter 36. Their real name is unknown as the concept of it was erased from existence by the Chainsaw Devil however their physical presence still remainsChainsaw Man Chapter 87. While Hybrids keep their human consciousness and control of their original human bodies normally, the consciousness of the devil still remains deep within. 
==Abilities==
As hybrids are part devil, they possess all innate abilities that devils possess except for Possession and Contract Creation. They also innately possess a unique of set of new abilities which include:
*Transformation (Hybrids are capable of transforming from their humans form to their hybrid form through activating their trigger. All triggers vary between hybrids and can range from pulling a chainsaw cord on the chestChainsaw Man Chapter 7 to pulling an arrow out of the right eye socketChainsaw Man Chapter 67)
**Regeneration (Up to High-Mid; Aside from drinking blood, by activating their triggers, hybrids have been shown to be able to reprocess the blood already in themselves to regenerate from wounds, this can range from a broken neckChainsaw Man Chapter 51 all the way to being reduced to just a headChainsaw Man Chapter 46)
**Resurrection (High-Mid; Similarly, hybrids can come back to life after death. Such as from events like drowning, being cursed to die by the Curse Devil or being reduced to just a head for a long while as long as someone activates their activation sourceChainsaw Man Chapter 24)
**Immortality (Type 2 & Possibly 7; Hybrids have been shown to be able to function temporarily from injuries such as decapitationChainsaw Man Chapter 128 as well as from both horizontal and vertical bisectionChainsaw Man Chapter 37Chainsaw Man Chapter 152 however this is dependent on how much blood they have left in their bodies. Also, after Reze had transformed, Kato & Tanabe didn't consider their ability to be able to work on her as they considered her non-living)
*Multiple Selves (Type 1 & 3; Hybrids are the fusions between devil and human with both of their consciousnesses remaining within the same body however typically the devil doesn't communicate with the human often if at all. There are some expectations to this thoughChainsaw Man Chapter 150)
==Resistances==
Possess all resistances that devils possess alongside:
*Conceptual Manipulation & Existence Erasure (Type 2; Hybrids continued to persist even after their concept was erased from existence by the Chainsaw Devil who erases concepts from the past, the present and even from individuals' memoriesChainsaw Man Chapter 84)
==Weaknesses==
Possesses all weaknesses that devils possess. Requires enough blood in their body in order to fully transformChainsaw Man Chapter 9. Likewise, requires their activation source to remain intact and them being able to physically activate it in order to achieve regeneration & self-resurrectionChainsaw Man Chapter 52. 
==References==
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Category:Verse-specific Powers and Abilities
Category:Chainsaw Man