Akuma

Akuma
Akuma (アクマ, Akuma? lit. demon) take up the majority of the Earl's army and serve as the "foot soldiers". When one is mourning for a lost relative or friend, the Earl appears offering to resurrect that member for them. However, the raised soul becomes the power source for the Earl's weapon and must obey his orders. In contrast, a Akuma "converted" by Cross can resist orders from the Earl for a limited amount of time. Akuma "wear" the skin of the one who resurrected them. They use this to blend in, as Exorcists cannot tell Akuma from human with the exception of Allen. The Akuma share a metal core made of dark matter that resembles a simplified human skeleton. Their blood also contains a blood virus, which rapidly travels through the victim's body, marking it with pentacles. The virus can be spread by blood bullets of a high caliber shot by the level one Akuma. Eventually, the body crumbles into dust and gives off a poisonous gas. The Akuma also evolve into higher levels, gaining strength as they do so, with level four being the highest seen so far. Each level Akuma becomes more humanoid than the level before it. As its evolution continues, the embedded soul deteriorates. An Akuma-producing plant, referred to as an "egg", is required to create Akuma. It has been destroyed. There is a special significance to the evolution of an Akuma. If destroyed by a force other than Innocence, the soul is consumed by dark matter and is destroyed.

Level 0
Level 0 is the Akuma right after being created. It is only the metal skeleton which is presented similarly to a model kit format when still unoccupied by a soul. The human soul is the dominant personality, but it is still bound to the Earl's control. The ends of the arms varies from Akuma to Akuma. The separate 'bones' are not connected in any way, but rather hover near where they would be connected. After a soul occupies the skeleton, a pentagon along with its host's name below it will be inscribed on the forehead of the skeletal structure. No matter how inhuman an Akuma becomes upon reaching level 2, the level 0 form remains as its skeleton.

Level 1
Level 1 consists of a floating ball shaped creature with dozens of gun barrels protruding from it that fire enlarged 5.56 x 45 mm NATO-like rounds. The gun barrels are flexible and can be bent to face any desired angle without affecting its firing capabilities. The bullets made of the blood of the Akuma is deadly to the human flesh, leaving black star marks, cracking and corroding the human's body. Only those with a parasitic Innocence like Allen Walker, Arystar Krory or Suman Dark can heal the virus, sucking the virus out with his teeth (for Allen, his Innocence just cures him of the akuma poison. Krory can also suck the virus out of other humans that were hit by an akuma blood bullet), from these bullets. The souls inside a Level 1 Akuma have the bodies and clothes of their original forms. However, their faces are rather distorted and there is a chain around their necks expressing intense pain and sadness of the trapped soul. Level 1 akuma exhibit somewhat a transition from deteriorating human personality to an evil personality for level 2 later on as observed in their increasing obsession to simply kill and may, hence, show zombie like behaviour in their human form. A Level 1 Akuma will advance to a Level 2 once it has fulfilled a substantial quota of kills of humans and exorcist.

Blood Bullet: The bullets shot by the Akuma contain a poisonous virus. The moment the bullet hits someone, the virus rapidly spreads throughout their body in the form of pentacles (dark purple stars), and they soon crumble to pieces.

Level 1.5
Level 1.5 is not an actual level per se, it is more of a mid-way point for a Level 1 Akuma. The only difference is that the Akuma becomes rounder and more spherical, with the ends of the barrels on the surface. Their facial expressions appears to show more instances of emotions closing in to a personality as of a level 2(In the anime, a level 1.5 akuma grins like a maniac when it successfully anticipates and counters Allen Walkers attack from behind a building.) Their bullets can also penetrate barriers that normal Level 1 Akuma bullets can't.

Level2
Level 2 produces a dramatic change. They develop a unique ability and a sense of self. Level 2 Akuma are capable of intelligent thought and are largely independent, though they still maintain unquestionable loyalty to the Millennium Earl and the Clan of Noah. The souls of Level 2 Akuma seem to become more deteriorated. The souls inside of these Akuma can't seem to be identified at all and are in a fetal position, wrapped from head to toe in bandages. Level 2 Akuma come in all shapes and sizes (some have even appeared simply as a gas, fire, a demonic court jester, or even a playing card) and they have no common appearance. They also have different powers, such as copying a person's appearance (mirror image), emitting "ice fire" which hurts worse than normal fire, creating blades of air, emitting destructive sound waves, and creating bubbles that absorb water from everything they touch. Some Level 2 Akuma even carry modern day weaponry such as homing missiles and varios types of firearms that resemble machine guns and so on, as observed in the mangas. After murdering enough people, it can evolve to Level 3.

Level 3
Level 3 brings perhaps the most terrifying changes of any previous stage. Regardless of their appearance in Level 2, all level 3 Akuma become bipedal, roughly 8 to 9 feet tall, with sharp jagged teeth, and wear what looks like medieval armor that covers most of their bodies. In addition to this, they receive a massive power boost. A Level 3 Akuma is easily capable of standing up to multiple exorcists in combat and usually has an extremely powerful ability in addition to its greatly improved strength and speed. Their abilities seem to revolve around the use of Dark Matter, the polar opposite of Innocence. The souls embedded in the level 3 Akuma are near gone and is a floating dark mass with eyes.

Giant Akuma
During the fight at Edo, The Earl revield that a mass number of Level 3's can fuse together to creat Giant Akuma. Due to their gigantic size they are slow but have long arms and legs to attack directly but their movment is awkward and easy to dodge if paying attention. Their skin is also very durable making it hard for an average Exorcist to do any damage to them. They can also preform and attack known as Evil Star Grita which fires rapid beams at any and all diretions. While still a high risk oponent they seem to lack much of any ability to think for themself and are generally seen taking orders from the Earl or a Noah. Bookman has comented on this and upon seeing them fuse at edo has staited that "The idiot machines have simply combined to make a bigger idiot machine".

Level 4
Level 4 is the most powerful and destructive akuma known to the exorcists so far. After the attack on headquarters, within the dead body of an akuma, emerged a level 4 akuma. Prior to this encounter, no akuma above a level 3 had been seen. The akuma takes the form a child-like creature with a bloated stomach. There is a black star on the akuma stomach and a lit, closed-ring, "halo-like" oval above its head. A level 4 akuma has a great amount of speed and power, far superior to the level 3 akumas. The level 4 akuma has been seen to create great balls of energy from its hands and is able to block attacks using it hands and fore arms.