Answer:
Watches students at the prom to make sure there's no funny business.
Four kings of whom I am one lord. Often on deck but never on board. Though I have a large heart, I am always seen at war. During which I always wear a suit, but never a suit of armor. Who or what am I?
People in love are often bound to this.
The more you take, the more you leave behind. What are they?
What cleans as it gets dirty only to get clean the more you use it?
I stay where I am when I go off. What am I?