Kabaiel

"Fair? The last one I killed was pretending to be a doctor. Feeding on the souls of humans he was supposed to heal."

- Jack arguing with the Grigori.

This unnamed Grigori was the last of his kind and enjoyed feeding off of the souls of children.

History
The Grigori started out as a squad of elite angels thousands of years ago and were some of the first angels to walk the Earth. According to Tamiel, there were originally hundreds of them and they each had their name engraved on their angel sword. However, they eventually went bad and the other angels hunted them down and killed them. Unknown to the other angels, some of the Grigori survived and began feeding off of human souls as they saw humans as beneath them.

Powers and Abilities
As a Grigori, he was part of an elite and very powerful class of angel.
 * Immortality - The Grigori have existed for thousands of years.
 * Angelic Possession - Like all angels, the Grigori need a vessel to walk the Earth. Like other angels, they need the vessel's permission.
 * Soul Feeding - The Grigori are able to feed on human souls to absorb their heavenly power. The Grigori Tamiel did this by cutting their arms and drawing parts of the soul into their mouths.
 * Invulnerability - As an angel, he was invulnerable to most forms of harm.
 * Telepathy - He was able to communicate through angel radio with his siblings.
 * Clairsentience - He was able to sense Jack's great power.
 * Torture - He possessed some skill in torture, using it against a captured Jack.

Weaknesses
He possessed all the regular weaknesses of a Grigori.
 * Seraphim - He was no match for the Seraphim Castiel.
 * Angel Blades - Castiel was able to kill him with an angel blade.

Appearances

 * Season 15
 * The Gamblers