Board Thread:General Discussion/@comment-25266931-20170126040344/@comment-27082610-20170201175125

Because Zwei is a living being with an awakened Aura, not a mindless death machine whose sole purpose is to kill and destroy. And yes, we do know that it only has two fingers. Every shot featuring its hands, including the close-up we got when it walked by Ren and Nora when they were kids, showed two fingers with claws. And those were people, something a Grimm is not.