Answer:
I am a protector. I sit on a bridge. One person can see right through me, while others wonder what I hide. What am I?
Lighter than feather and softer than silk, yet the strongest man in the world cannot hold me for more than a few minutes. What am I?
I am a tool for fairies.
A hole in a pole. Though I fill a hole in white I'm used more by the day and less by the night
A dagger thrust at my own heart dictates the way I'm swayed. Left I stand and right I yield to the twisting of the blade. What am I?
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.