Answer:
You have it even if there is none.
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?
If you need a night out, call one of these over to take the little ones off your hands for a while.
I cannot be felt, seen or touched; Yet I can be found in everybody; My existence is always in debate; Yet there is a style of music named after me.
Your computer\'s version of white-out.
I stay where I am when I go off. What am I?