For one of the upcoming contests I'm planning on writing a story in which there is a character whose presence is not disclosed to the readers, but a series of small clues easily overlooked point to them existing before a surprise reveal at the end, similar to tropes used for characters revealed to be hidden villains, dead all along or figments of another character's imagination.
To clarify, I don't mean an unseen character - like Maris Crane from Frasier - I've written these in the past, sometimes they form part of the plot without making an appearance, other times they are simply referenced but don't make it onto the page in person. I've called them 'hidden characters' because I really wasn't sure what else to call them, somebody else might know the correct term.
Has anyone ever written anything like this, or read a book, or seen a movie or TV show where this happened? If so, what did you think of it?
To clarify, I don't mean an unseen character - like Maris Crane from Frasier - I've written these in the past, sometimes they form part of the plot without making an appearance, other times they are simply referenced but don't make it onto the page in person. I've called them 'hidden characters' because I really wasn't sure what else to call them, somebody else might know the correct term.
Has anyone ever written anything like this, or read a book, or seen a movie or TV show where this happened? If so, what did you think of it?