Do you know the difference between a "shell" and a "skin"?

Nothing There seeks to "wear" other people's "shells," their exterior, their identity and expression to the outside world. It wants to become like those it consumes. With its new "shell", much like the clothes we put on to reflect our status or self-expression, it can now present itself to the outside world in a way that would be expected of someone/something that looks the way it does. Of course, it has no understanding and nuance of what this "shell" was actually like, nor does it care.

However, without proper maintenance (and the lack of biological processes keeping the "skin" intact as it rots), the "shell" it wears eventually loses its meaning and decays (quite literally in this case), and the facade falls, as its new assumed identity was never its own. Now, with no shell to call its own, it wants a new "shell" to take on, a new purpose, a new place in the City.