Walter Alston is a former priest and a half-demon, like his mentor Robert Vasic. Walter, rebelling against his mentors teachings, considers Robert to be his arch-nemesis. It is only Walter who feels this way, as Robert is only merely disappointed in his former pupil. Rather than learning about demons through studies, Alston instead summons them. Something which he is quite good at. He is also always willing to summon any demon for someone should they ask, but for a price. He makes a good living from it, judging from his nice home.