Answer:
I can be red blue purple and green. No one can reach me not even the queen.
I get paid to shoot people then blow them up.
You find me behind the stars; or in a sixth seventh or third. It takes something round a computer and me to make pie. I am bigger than anything you can think of.
Crooked as a rainbow and slick as a plate ten thousand horses can't pull me straight.
Born of sorrow, grow with age, you need a lot of me to be a sage. What am I?
Though not a plant, has leaves. Though not a beast, has spine. Though many wouldn't need this thing, It's more valuable than wine.