She occasionally appears as a ghost later in the series.
He realizes that his girlfriend only appeared as a ghost.
After this, he appeared as a ghost multiple times between 1994 and 2001.
Deceased by the time of the story, but (supposedly) still appearing as a ghost.
Calvin appeared again as a ghost in February 2011.
But my favourite is when I appear as a ghost on the station platform in the final film.
Paul only appeared as a traditional ghost because he wore a sheet over his head in an attempt to look ghostly.
Hector appears as a ghost, talks to Molly and witnesses these events.
Perhaps it is you that appears as a ghost to me.
Church appears as a ghost for portions of the show, and he needed to appear transparent to the viewer.