William Birkin, in his early form. He still retains human features and form. Already ivident is his increditble power. He has been seen wandering the Raccoon City underground, apparently following a little blonde-haired child.
William Birkin, former head-scientist for Umbrella, recently turned Sewer Stalker. In his dying moments, William injected himself with the as yet untested "G" Virus. It gave him super human strength, but we still do not know whether it has affected his mental capacity to rationalize.
Mr. Birkin's second form, an apparent mutation from "G" Type 1, is even more menacing than the first. His added height and extra set of appendages now gives him reach as well as power.
A more evolved form of the "G" Virus host. In the latter stages of trasformation, William losess any resemblance to his former human form, becoming more animal-like. At the same time his instincts seem to have changed.
