Chapter 5 of “Harry Potter and the Prisoner of Azkaban” is called “The Dementor.” In this chapter, Harry is still adjusting to his new life at Hogwarts School of Witchcraft and Wizardry. He learns about Dementors, dark creatures that guard the wizard prison, Azkaban.

Harry attends his first Defense Against the Dark Arts class with Professor Lupin. Lupin teaches the students about Dementors and explains that they feed on happy memories, leaving people feeling cold and miserable. He warns the students that Dementors are the guards of Azkaban and are very dangerous.

During a Quidditch match, Harry encounters a Dementor for the first time. The Dementor’s presence affects him deeply, causing him to relive his parents’ death and fall off his broomstick. Luckily, Professor Lupin saves him by casting a powerful spell to repel the Dementor.

After the incident, Harry is taken to the hospital wing, where he meets Professor Lupin again. Lupin explains that he was able to repel the Dementor because he possesses a rare ability called the Patronus Charm. This charm creates a protective shield against Dementors by summoning a positive force, like a happy memory.

Harry is determined to learn the Patronus Charm to protect himself from Dementors. Professor Lupin agrees to teach him, but warns that it is an advanced spell and not easy to master. Harry is excited about the prospect of learning this powerful magic and feels hopeful that he can overcome the fear and darkness that Dementors bring.

In this chapter, we learn about Dementors and their role in guarding Azkaban. We also see Harry’s first encounter with a Dementor and his determination to learn the Patronus Charm. It is an exciting chapter that introduces us to new magical creatures and sets the stage for Harry’s upcoming challenges.