You do realize that this is Black Orchid:
https://i.ytimg.com/vi/094lx00CiT0/maxresdefault.jpg
Her name, or rather, her codename is Black Orchid. So calling her “shadow” version for Black Orchid would just be confusing, as it would not differentiate her from the non-shadow version.
However, at the same time it would be clever, as it IS the same character, just… well… changed.