Demons are a species found in Grand Chase and its sequel Grand Chase Dimensional Chaser. There are two demon races introduced in the series thus far: the Asmodians of Elyos and the Haros of the Underworld. Though the Haros and the Asmodians are both demons, the two races can be distinguished by the Haros's lack of horns, paler skin tone, and shorter ears.
The demons inhabiting Elyos are known as the Asmodians and a large majority of them introduced in the series hail from this race. They are demons created by the Supreme Creator who are responsible for the destruction of decrepit worlds and receive direct orders from the Creator to do so.
When they felt the necessity, the demons traverse through the Dimensional Portals to cause destruction.
Asmodians have lifespans numbering in the thousands, with Asmodians such as Dio and Ley being around 2000 years old, while older demons like Heitaros and Veigas having been alive since the time of the Ancient War. Over time, the Asmodians have become split into numerous tribes and two major factions: the Moderates and the Extremists.
The Haros are a tribe of demons native to the Underworld and are the guardians of that world. They have the authority and responsibility to watch over the souls trapped in Underworld, as well as bringing them back if they escaped.
Amongst them are the Bounty Hunters, warriors who are held responsible for chasing down evil souls that might escape from the Underworld's prison as well as any creatures native to the Underworld that have fled into Aernas. This also includes resurrected souls, as resurrecting the dead is against the rules of the Underworld. These Bounty Hunters have special abilities that allow them to either send the refugee back to the Underworld, or exorcise them completely. However, they usually do not pursue creatures that do not belong in the Underworld.
Young Haros half-bloods have hideous appearances such as scale-shaped growths on their faces as a side-effect of their half-blood status, though the effect seems to disappear as they grow older.