Gregor was a vampire that appeared in No One Comes to Lupusville. He hires the Ghostbusters to get rid of vampires in his village. He then kidnaps Egon and Winston and is revealed to be a vampire. He was last seen fighting in a battle against vampires and werewolves. He is not to be confused with Cohila from Extreme Ghostbusters, who calls himself Gregor in human form.