Who is Officer Luciana / Esme Squalor from The Vile Village and what is their importance?

Officer Luciana is the sole policewoman in the V.F.D. She is described as a very tall woman, always wearing black boots, red lipstick, and a motorcycle helmet with the visor pulled down to cover her eyes. Later in the novel, it is revealed that Luciana always wears this outfit to disguise the fact that she is actually Esme Squalor, the villain from a previous installment of the series. In "The Vile Village," Officer Luciana aides Count Olaf in Jacques' murder and helps Olaf escape at the end of the novel.