Its a demon, a djinn is a demon They can be either good or evil,
The djinn are less powerful than angels, but can assume the shapes of humans, animals or whirlwinds.
Belief in djinns has been wide-spread throughout the Arabian Peninsula and Central Asia; the spirits are even mentioned in the Koran. In fact, Satan often is believed to be the most prominent of the djinns.
Belief in djinns may well predate both Christianity and Islam.