Vinz Clortho

Vinz Clortho - also known as The Keymaster - is a demonic entity from the film Ghostbusters. This creature is a minion of Gozer, an ancient Sumerian deity destined to destroy the world. Whenever Gozer traveled to a new world, it sent its acolytes Vinz and Zuul ahead to prepare that world for the Destructor's coming. When it manifested in the material world, Vinz took on the form of a Terror Dog.

History
In 1984, Vinz Clortho appeared at the Shandor Building at 550 Central Park West in New York City. Initially, it appeared in the apartment of Dana Barrett, appearing inside her refrigerator and calling out the word "Zuul". Dana would later call on the fledgling Ghostbusters Inc. to investigate, and while Dr. Peter Venkman noticed evidence of unusual activity in Dana's kitchen (namely the eggs that had broken out of their shells and cooked on the counter) there was no other reading to suggest anything paranormal had occurred.

Vinz would reappear weeks later while Louis Tully, another resident of the Shandor Building, was throwing a party in his apartment. Seeing Louis as an appropriate host, it attacked him in plain view of all the party guests. Louis ran away, fleeing the building, but the Terror Dog pursued and cornered him outside a five-star restaurant. The restaurant patrons completely ignored Louis as Vinz pounced on him and possessed him. Once in control of Louis' body, Vinz went wandering in search of Zuul, the Gatekeeper of Gozer. To the public, it appeared that Louis was an intoxicated derelict and he was picked up by the police. Vinz's ramblings led the cops to believe that the Ghostbusters might know what was wrong with him, and so they took him to the Ghostbusters' firehouse where Egon Spengler examined him.

Using an Aura Video-Analyzer on Louis, Egon discovered that the poor man before him was, indeed, possessed by a demon, seeing the Terror Dog's head on a video screen. Egon asked who the demon was and Vinz introduced himself, explaining his purpose and how Gozer was coming to bring the world to ruin.

The next morning, Louis/Vinz was still at the firehouse when Walter Peck of the Environmental Protection Agency came in order to shut down the Ghostbusters' Ecto-Containment Unit. Despite the protests of Drs Venkman, Spengler and receptionist Janine Melnitz, Peck shut off the containment grid, causing an explosion of spiritual energy and the release of all the captured ghosts. In the chaos, Vinz escaped and wandered back to the Shandor Building. When he arrived, he was greeted by Zuul, who had possessed Dana Barrett's body. The two embraced and kissed passionately before ascending a secret stairway leading to a gateway on the roof from which Gozer was to emerge.

That night, the Ghostbusters arrived at the Shandor Building's rooftop where they witnessed Louis and Dana transform into Terror Dogs and take their places flanking the gateway as Gozer emerged. They remained in place like stone gargoyles while the Ghostbusters fought against Gozer. After the team crossed their particle streams and destroyed the gate, Gozer and its minions were banished and Louis and Dana were restored to normal, singed from the explosion and buried under the debris of the hollow gargoyles, but otherwise unhurt.

Personality
Unlike the more seductive and tempered Zuul, Vinz was more dim-witted. For example, he confused the Gatekeeper with a horse while attempting to identify its partner. Vinz also repeats human behaviors and speech to mimic humans in close proximity, such as Egon. Also, while Zuul secretively ambushed her host Dana in her apartment, Vinz recklessly attacked Louis in full view of others at a party, before chasing him out of the building and through an active street.