They serve Kadriar and Aecliress, and rule over the lower levels of Hell. They consist of Wrath, Greed, Sloth, Pride, Lust, Envy, and Gluttony. They seem to have a power far more stronger than any denizen of Hell, but yet serve in it, for reasons unknown. They can take any shape or form they please, but are rarely (if ever) seen outside of the Demon Realm.
Each Deadly Sin has their own specialized type of minion.
Wrath: Havoc Demons
Greed: Praexis Demons
Sloth: Velox Ursus
Pride: Whatever is strongest in Hell at the time