The topic of the Mary Sue comes up occasionally in writing forums. Everyone agrees: you don’t want your character to be a Mary Sue. She’s the worst of the worst, beloved only by the author and despised by the reader. She is the undeniable sign of the bad writer, the demoness, and once part of a story she cannot be expunged; the whole story is doomed to the deepest pit of hell.
But what is a Mary Sue? Now there’s a question.