Answer:
I can be sweet or sour. I do not rhyme with any other word
I'm a ruler with 12 agents. Half of them work in the darkness. Who am I?
I am pronounced as one letter written with three. I come in blue black brown or grey. Reverse me and I read the same either way.
I can be hairy and itchy all over. I hang on a stick. I can be the scariest thing you have ever seen. I stand in the middle of nowhere.
I move without wings between silken strings. I leave as you find my substance behind
The answer I give is yes, but what I mean is no. What was the question?