assistance, and thus acquires the Patronus Charm. At the beginning of Order of the Phoenix, two dementors are dispatched to Little Whinging to assassinate Harry, and nearly drain the soul from his cousin Dudley Dursley before Harry drives them off with the Patronus (It is later learned that they were sent by Minister Fudge's corrupt secretary Dolores Umbridge, a possible mole for the Death Eaters). By the novel's end, the dementors of Azkaban stage a mass revolt against their employers to join Voldemort, who permits them nearly free access to victims. In Deathly Hallows, the Ministry, under the control of Voldemort, uses dementors to punish Muggle-borns. The dementors also take Voldemort's side during the Battle of Hogwarts. After the appointment of Kingsley Shacklebolt as Minister of Magic, dementors are removed from Azkaban, and the Ministry contains them by limiting their numbers. Rowling created the dementors after a time in which she, in her own words, "was clinically depressed". Ghosts Ghosts play an important secondary role, mainly as advisors to the leading characters. Unlike the ghosts in a traditional ghost story, these ghosts are neither frightening nor necessarily ghoulish. Ghosts in the novels appear silvery and translucent. They can fly and pass through walls, tables, and other solid objects, but nonetheless have some ability to physically affect, and be affected by, the living world. (Moaning Myrtle, for instance, can splash the water in her toilet.) Ghosts' banquet tables are laden with rotten food, as the decomposition increases their ability to smell and taste it. Touching or walking through a ghost induces a sensation "like walking through an icy shower." Ghosts can be affected by magic and curses, though not to the same degree that living beings can. In the Harry Potter universe, only wizards and witches can become ghosts. As Nearly Headless Nick explained to Harry, "Wizards can leave an imprint of themselves upon the earth, to walk palely where their living selves once trod ... I was afraid of death. I chose to remain behind. I sometimes wonder whether I oughtn't to have ... Well, that is neither here nor there ... In fact, I am neither here nor there ..." Despite having chosen this afterlife, many ghosts bemoan their inability to eat, and many are described as gloomy. They also harbour an attraction to imagery morbid and melancholy. Ghosts are very sensitive about their condition: when the Ministry initially