I think this piece answers well the question of why she left the wizarding world. "Grim" is a well-matched description of the world she lives in, trading one grim world for a hopefully less grim one. (I like the disclaimer poem. Wow, what a contrast to the story...)
Author's Response: Glad you liked it. I'm working on completing this fic.
Good story, beautiful and sad at the same time...
Author's Response: Thank you! More beauty and sadness to come.