Viggo

Viggo is a demon who works for Crowley. He was put in charge of the torture of the angel, Samandriel.

History
Viggo is assigned by Crowley to torture the angel, Samandriel, for anything useful he can get from him. After discovering that Samandriel has pushed the spike out of his head that is keeping him from communicating with other angels and has sent out a distress call, Viggo puts the spike back in and sets up headgear with multiple spikes to torture him.

While torturing Samandiriel in this way, Samandriel suddenly starts speaking in Enochian. Not understanding it, Viggo summons Crowley. Viggo watches as Crowley tortures Samandriel himself for anything useful, but gets nervous when he hears the sounds of Sam and Dean attacking the base to rescue Samandiriel. Crowley, however, basically tells him to not worry. As Sam and Dean try to break down the door to the room, Viggo is shocked to hear that what Samandiriel has just revealed is the existence of an angel tablet.

Sam and Dean break into the room as Crowley flees and Viggo grabs a knife and fights Dean. Viggo proves stronger than Dean, but Dean ultimately manages to overpower him. After everyone else is killed and Samandriel is rescued and taken away by Castiel, Dean turns his attention back to Viggo. Viggo pleads for his life, telling Dean that he knows things Dean needs to know. Dean pretends to agree with him, then stabs Viggo with Ruby's knife, killing him.

Powers & Abilities
He has standard demonic powers and abilities. But, as a proficient torturer, he has some abilities which unique to him.
 * Superhuman Strength - He also shown some skills of hand-to-hand combat and/or armed close range combat. He also capable to overpowered full grown adult human like Dean, even lesser angel like Samandriel.
 * Torturing - He was very mastered and proficient torturer. He knows many torturing techniques to extract valuable informations from his enemy.
 * Angel Hacking - He at least knew a method to "hack" angel's "factory setting". By penetrating some special metal spikes to angelic vessel's brain, he able to breach their "factory setting" and extract some valuable information. However, due he lacked any knowledge of Enochian, he cannot directly used the information. His angel hacking method later used by Crowley.
 * Magic - He displayed some capabilities to use magic. At least, he used it to summon Crowley and creating warding runes.

Weakness

 * Ruby's knife - The knife was able to kill him.

Appearance

 * Season 8
 * Torn and Frayed