Answer:
Angels and pilots work with me.
I am a tale in childrens' minds. Though an illusion, I occur every night. I give them a fantasy, I give them a fright. What am I?
Though not a plant I have leaves. though not a beast I have spine. Though many wouldn't need me I am more valuable than wine.
The more I dry, the wetter I get. What am I?
If two is company and three is a crowd, what is four and five?
I'm the source of all emotion but I'm caged in a white prison.