“Pac-Man” knows a quartet of ghosts.
Unfortunately, they are of the unfriendly variety, and constantly pursue him with nefarious intentions.
Their names are Inky, Blinky, Pinky and Clyde.
=======================
On a more serious note, supposedly President Lincoln’s ghost is sometimes seen in the White house.
On the day before he was murdered he famously had a dream about mourners crying over his assassination.