Answer:
The 8 of us go forth and not back to protect our king from a foe's attack. What am I?
I am constantly overlooked by everyone but everyone has me. What am I?
I am the place where yesterday is always before today. What am I?
I am the noblest musical instrument
I am black, white, and read all over. What am I?
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.