Answer:
I like to twirl my body but keep my head up high. After I go in, everything becomes tight. What am I?
I am the home for feathery animals.
I have a small hill with seven holes. What am I?
I'm a ruler with 12 agents. Half of them work in the darkness. Who am I?
I run through hills. I veer around mountains. I leap over rivers and crawl through the forests. Step out your door to find me. 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.