Answer: importance
Sitting in a room full of mistakes
I had to find room for my faith.
Underneath my sorrow
there I see,
a letter sitting there
waiting for me.
As I open it up
and see what is there
I pause and then even stare.
There I see a letter of glee
showing me there is importance in me.
The word "smiling" is a verb that functions as an adjective. Because the vampire is smiling then it would be a verb. But it also characterizes what type of vampire which is a "smiling vampire", so it is an adjective