Your primary defense and testing tool.
Unbelievably fast when it sees you, but moves at a "crawl" when it doesn't have line-of-sight.
Its speed is tied to room temperature. It is fast in the freezing ghost room but slow in warm areas like the hallway. Unique Interactions
NO EVIDENCE CHALLENGE - Identify the ghost! - Steam Community
The only way to identify certain "vocal" ghosts like the Banshee.
Vital for checking for Wraiths or tracking ghost movement.