The thoughts I had when writing this poem, albeit short, is that the little girl is depressed and struggling with her daily life in a place that she knows won't last because none of the rest have.
If you read it from the bottom up the girl has been 'set free' in the sense that she is now dead and the temporary home is the grave and "she stands hard as stone" the "stone" represents the head stone that marked her existence.
If you have any other way of interpreting this please let me know in the comments below.