| Description | Character | Which Film(s)? |
| The Destructor, very big in Sumeria | |
| The form chosen for the Destructor | |
| Deceased surgeon and architect, worshipper of the Destructor | |
| The Gatekeeper | |
| The Keymaster | |
| Son of the Ghostbusters' first client | |
| Evil tyrant trapped within a painting | |
| Museum curator, originally from 'the Upper West Side' | |
| Mayor's assistant | |
| Librarian whose uncle thought he was Saint Jerome | |
| Delighted to kick the Ghostbusters out of the University | |
| The mayor's friend in the clergy | |
| Skeptical judge also known as 'The Hammer' | |
| Murderers put to death by 'The Hammer', brought forth by mood slime | |