Then there's also the phenomenon where a writer creates a character with a clear intention of where that character should go, but the character runs away from him in an unexpected direction. Like, the more you write that character, the sheer force of personality starts steering you towards another path. It happens to the best of writers. When Terry Pratchett created the Watch in his Discworld novels, he intended Carrot to be the hero, and Captain Vimes as a mere supporting character. In a Q&A I attended he admitted that, but the character complexity of Vimes turned out to be so much more compelling to him as a writer than the rather boring hero archetype that Carrot represented, so the focus of the Watch novels shifted, and the rest is history.