You be working on this story, and all of a suddenly this annoying 'Mary-Sue' character comes out of the blue and disrupts the entire plot. Right now, it's happening to me, I'm working on something about a mysterious ghost town far back in the woods that no one ever want to talk about, and all at once this annoying weaboo character comes out of nowhere and starts harassing my main character. So now I'm trying to decided whether to have her die a really grisly death at the hands of these things living in this ghost town or leave her out of the story all together.