The harlequin

Malcolm, the priggish head of the Church of the Eternal Life (the vampire church), is so desperate for help in dealing with the Harlequin, a troop of vampire enforcers and spies so feared vampires are forbidden to speak its name, he turns to those he considers sinful and corrupt—Anita and her sweetie, Jean-Claude, St. Louis's Master of the City. The Harlequin may have targeted Anita and the powerful triumvirate she has forged with Jean-Claude and Richard Zeeman (aka Ulfric of the werewolves). According to the rules, the Harlequin must make contact through delivery of a mask—white to indicate they are watching, red for pain, black for death. Anita receives a white mask, but the members of the Harlequin aren't playing by the rules.