Alistair Coleman, callsign Shadow 0-3 and Excalibur, is a Senior Officer of Shadow Company. Coleman served as a member of the Helios Corporation's security forces under the tenure of its founder Mr. Mendelsohn and left after his passing. He joined Vanguard Security as a contractor, serving in this capacity for a good number of years until 2131 when he joined Shadow Company after being convinced by Philips Graves, becoming Shadow 0-3 and a Senior Officer.
