Answer:
I am whole but incomplete. I have no eyes, yet I see. You can see, and see right through me. My largest part is one fourth of what I once was.
What has a single eye but cannot see?
What is never used unless it's in a tight place?
What goes in the water red, and comes out black?
A warrior amongst the flowers, he bears a thrusting sword. He uses it whenever he must, to defend his golden hoard.
I have two eyes in the front and a lot of eyes on my tail