[crashryan]

Interesting...I think that at first the author meant Zero's mask to cover his entire head rather than leaving the mouth and chin exposed. In the first chapter he writes that "the mask crinkled...Zero was smiling." But later when the Rattlers steal Zero's suit the author describes a "cowl...which covered half the face." Maybe the editor suggested changing the mask to match the title illustration.

Link to the book: Zero the Silent, the first story