They really seem like mindless worker bees who only follow orders. Kiel and Orphell kind of fell off the waggon and awoke to have a will on their own. But I can't really think of the both of them as sheep. Kiel proved that he has teeth and claws and can bare them and even Orphell showed signs of such traits. In my mind they more resemble dogs with sheep clothing.
I mostly referred to the color scheme, especially since Rood's awakening turns every color he is wearing (which is mostly white) to black. I liked the episode when he disguised himself as tower mage and awakened within the "herd".