Demons

Characteristics
Demons are typically very murderous and tend to do anything to "escape" from Hell. While noted to be a terrible place, demons typically might grow fond of Hell as that is considered their home. A demon is created when a soul is sent to Hell because they commited terrible acts of cruelity, be it murder or other means. Once there, they are torutred for long periods of time, sometimes forever, until they are stripped of all humanity and become the demon.

When a demon escapes from Hell, they tend to do anything to try and free Lucifer from his Cage and/or bring him out of Hell altogether.

While all are monstrous and murderous, some consider the demons they are typically around to be "friends". When his followers were killed, Cain escaped from Hell for the sole purpose of killing Bane. However, this may just be because all demons typically hate each other.

Some demons also possess a human form, having had a body created in Hell to resemble a human being. These bodies typically resemble the demon when they were alive.

Hierarchy & Cults
Demons do have a form of hierarchy. Above all demons, Lucifer is the most powerful. Next to him at some point are the demonic leaders, demons powerful enough that they run their own "Cult", a group of demonic followers who try to claim bits and pieces of Hell as their own.

While demonic leaders are typically no different than other demons, they are the most powerful and most skillful demon and others tend to view them as a demon that all demons should be like. Known demonic leaders, with their own cults, are:
 * Bane: Presumably left his Cult behind in Hell when he escaped. His Cult is presumably disbanded.
 * Cain: Cult was killed off by Bane, making him the only survivor.

Species
There are a few known different kinds of demons. Aaric Mitchell and Caleb Mitchell have made journals on demons that they have encountered.

Witches
Witches are women who make deals with a Deal-Making Demons in exchange for demonic powers that are unique specifically to them at the cost of her soul. When a woman becomes a witch, her eyes become completely black, as well as her aging coming to a halt.

Being extemely powerful, witches commonly are recruited by other demons to perform a simple job before the witch goes her own way. Some demons will follow a witch if she is working for another demon.

Possessor Demon
A Possessor Demon is a demon that possesses a living person to use as a host while on Earth. So far, possessor demons have yet to be encountered. However, Aaric Mitchell and Caleb Mitchell have apparently come across them before.

Alpha Vampire
Alpha Vampires were created by a witch long ago, however she only created so many at a limited number. Alpha Vampires can turn other living people into Lesser Vampires, however lesser vampirers cannot turn others. In addition, the Alpha is linked to the people they turn and upon his/her death, the people they turned also die as well.

Whether or not their soul goes to Hell upon death is unknown.