The Akuma

the Akuma are the minions and personal army of the millennium Earl and Noah's family. Despite their name (Akuma is the Japanese word for Devil) their aren't infernal demons or anything else, but they are weapons which are build by the Earl, using a human soul and the body of one alive. The Akuma are programmed for killing humans and fight against the exorcists who are the only persons who can defeated them with the help of the innocence, which is in contrast with the Dark Matter that compose their body. Despite the fact that they act like villains and seems cruel and merciless in killing humans, they are make with suffering humans souls, who are enslave to the Millenium Earl's commands, and forced to obey to him against their will.

Creation and purification
The Akuma are create when the Millenium Earl make a contract with a person who lost a loved one, promising to him/her to bring back his/her soul from the after life, but this is later revealed to be a trick. In fact when the soul of the dead is summon by the Earl, it is trapped in a Dark Matter Skeleton, and forced to obey to the Millenium Earl who orders to the new Akuma to kill the loved one who asked for his/her resurrection, and take control of his/her body. At this point the Akuma continue to live between humans, hiding their presence and pretending to be like them for kill in secrets the people, evolving themselves and become more powerful. The only thing who can destroy the Akuma is the innocence, which is used by the exorcists in their fight against them. If the akuma is killed by an exorcist, the soul in the inner can find peace and rest, but if the Dark Matter explode or is destroyed in other ways, the humans soul vanish forever.

Evolution
Level 1

Level 1 consists of a floating ball shaped creature with dozens of gun barrels protruding from it that fire large bullets. The gun barrels are flexible and can be bent to face any desired angle without affecting its firing capabilities.Level 1 Akuma appear to be able to fire beams of energy from an opening beneath their face. This attack is called "Akuma Cannon" by the Earl. 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 the intense pain and sadness of the trapped soul. Level 1 Akuma exhibit something of a transition from the deterioration of their human personality into an evil personality for level 2 later on as observed in their increasing obsession to simply kill and may, hence, show zombie like behavior 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 exorcists.