Was Midori right?
Was she right to kick reki out of abandonded factory? The hyouko incident definitely created cause for her anger. The obvious answer is yes. If reki had stayed she would have never met rakka. Also hypothetically ignoring the seperation order from the renmei. Could she have achieved salvation through some other means at abandonded factory? Could there be multiple ways to have a day of flight? Is reki and rakkas relationship so unique that the outcome could not be replicated with any other character?
I think it's important to note the similar situation with kuromori. Rekis curse caused kuromori to go into the forest and come back with an illness. Nemu shunned reki for a bit but later forgave and came around.
I believe she could have had her day of flight at abandonded factory. Her expulsion only added another layer of depth to her sinbound illness. Reki having her "please help me" moment with midori or hyouko is possible. Hyouko early on paints her wings yellow. Where did he get that idea? There just might be another sinbound haibane at the factory!