demonologist
/ˌdiːməˈnɑːlədʒɪst/
noun
- A person who studies demons or beliefs about demons.
- In the movie, a demonologist helps the family understand the strange events in their house.
- The demonologist was invited to speak at the university about ancient demon lore.
- A demonologist must be familiar with religious texts and historical accounts of demonic possession.