Answer:
Possibly the only famous plumber who has the courage to ever to rescue a princess.
A white field, and when it is plowed, its soil is black.
What asks no questions but requires many answers?
I usually wear a yellow coat. I usually have a dark head. I make marks wherever I go.
This royal young lady had several short men following her and helping her in the forest!
Black we are and much admired. Many seek us if they are tired. We tire the horse, and comfort man, and turn White when we've fulfilled your plan.