'''Demetos''' is a [[Deathwatch]] [[Watch Captain|Captain]] of [[Watch Fortress Prescience]], who served in the [[Indomitus Crusade]]'s [[Battle Group Kallides (Fleet Primus)|Battle Group Kallides]]. When the Battle Group fought the [[Necron]]s in the [[Pariah Nexus]], Demetos claimed the members of Prescience had the skills to pierce the shadows the [[Xenos]] were hiding in.{{Fn|1}}