Answer:
I have a pet, his body is full of coins
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?
Where humans breathe liquid.
You can break it or drink water from it.
Before Google, we actually had to physically look things up in this building full of knowledge.
I am the fountain from which no one can drink. For many I am considered a necessary link. Like gold to all I am sought for, but my continued death brings wealth for all to want more.