“My original conception of the character Bloom was of an older, overweight female gardener fairy. This was based entirely on the line at the beginning of the story, which told that her tread was heavy and her feet left tiny cracks in the glass floors of the city. It really took me aback when our editor insisted that Bloom was a seven-year-old girl. I had to rethink — and especially re-read — everything in a completely new light. I found a way to make the change by envisioning her as a tomboy, stomping around the castle.”
A dab of backstory and a bit of process, with Seven Impossible Things Before Breakfast.