|Profession||Lord Loss' familiar|
|Book Universe||The Demonata|
|First Book Appearance||"Slawter"|
|Last Book Appearance||"Slawter"|
He was a cockroach type demon with other demonic type features such as spikes for legs. He seems to have replaced Vein as she was killed by Lord Loss previously for disobeying orders. Gregor accompanies Lord Loss during his attack on the film set of 'Slawter'. He is killed by Grubbs and Dervish when they attempt to break the barrier surrounding 'Slawter'.
When they are attacking Gregor, he knocks out Juni Swan as she goes to kill the demon. He later dies at Grubbs' hands. Lord Loss later calls Gregor a fool for dying so easily. Gregor's importance towards Lord Loss is fairly debatable as he seems to have replaced the Demon Master's previous familiar Vein. Although when Gregor is killed, Lord Loss is enraged, calling him a 'Fool' showing that the Demon Master was clearly annoyed that his Demon had died so easily.
- The name Gregor appears to be a reference to something, as Bo Kooniart says that it was "very funny" in Slawter. Grubbs, the narrator of this book, doesn't understand the reference, and therefore neither will the reader without further research.