Answer:
I have a gown but I'm not a priest; I have a crown but I'm not a king.
I can be hairy and itchy all over. I hang on a stick. I can be the scariest thing you have ever seen. I stand in the middle of nowhere.
I save lives on the ground and in the air
What force and strength cannot get through I with my unique teeth can do.
I am a rock group that has 4 members, all of whom are dead, one of which was assassinated. What am I?
No matter how little or how much you use me, you change me every month.