When the author creates that persistent character…

The author in “writing mode” creates characters, situations and sometimes even whole worlds — when those creations seem to become real, so real that they won’t fade away without a struggle, it is an accomplishment worth celebrating.
I’ve known that joy and in some cases the characters were so persistent that even though I had already typed “The End” there was so much more to say.
The first time this happened to me was after I finished the story His Lucky Charm (by the way the original title was...