Mercuria was an Aurelian agent (an Ace of Wands) who murdered and took over the identity of Specialist NightStalker of the Pegasus Ship's Watch. She was assigned to guard TyroCommanderPhil Redfire after he was accused of murdering Clinton Manchester on the planet Winter . She escaped with Redfire and took him to the site of an Ancient Colonial Landing Pod, where she sexually tortured him and tried to recruit him as an agent for the Aurelians. Redfire resisted and escaped, eventually killing Mercuria.

(Book 04: Winter )