Awakened Beings, officially, are known to humans as Voracious Eaters, and are explained as simply being Yoma that have simply lived too long and as a result have become more powerful. This lie was made up in order to cover up the fact that it is actually Claymores themselves who become this bigger, stronger type of Yoma. At the start of the story, the Organization turned a blind eye to Awakened Beings, only hunting them when payed to by a town. After the invasion of Pieta however, The Organization changed their rules to actively hunt any Awakened Being once it was discovered.