The Demon Collective Emissary was an agent of the Demon Collective of New York during the Old West era.
When news of the capture of The Rudely Mallard Gang spread to the Demon Collective, they were angered and declared 100 demons would be sent to the Red River Valley to dispatch Peter Venkman. An emissary was sent to the town announce the demons would arrive by train at midnight from Hell. The entity remained at the Grand Palace Hotel & Saloon. Peter confronted the emissary only to find ectoplasmic flames and a new ally named Rachel Unglighter. Together, they trapped the emissary.
The emissary is a bizarre entity with multiple cow heads, eyes, hooves, and udders.