Ann Moss is Alan Wood's sister, referred to by him, and therefore Snitter also, as Mrs. Annie Mossity — a pun on "". She is a domineering woman, and it is implied that her husband ran off without the formalities of a divorce because he could not stand her any more. She is disdainful of her brother's easygoing, untidy ways and has hated Snitter since she first met him. To her falls the responsibility of looking after Snitter after Wood's road accident, which she discharges by selling him to ARSE, buying fur-lined boots and gloves with the proceeds, and lying to Alan to cover her misdeeds. She is interviewed by Digby Driver midway through the book, and is successful in falsely confirming Driver's assumption that her brother is dead. When Driver finds out about the truth, he confronts Moss and interrogates her. Moss reveals her whereabouts and Driver helps Wood find Snitter and Rowf.