Karen Singer demon

This unnamed demon possessed Karen Singer.

Powers and Abilities
This demon appeared to be a regular low-level demon with the powers of one.
 * Demonic Possession - As a demon, she needed a vessel to walk the Earth.
 * Immortality - As a demon, she would never age or die unless killed.
 * Invulnerability - As a demon, she was invulnerable to normal methods of harm.

Weaknesses
As a regular low-level demon, he possessed all the weaknesses of one.
 * Exorcism - Like all low-level demons, she was vulnerable to exorcisms.

Appearances

 * Season 3
 * Dream A Little Dream (mentioned only)
 * Season 6
 * ''...And Then There Were None (mentioned only)