Lord Voldemort (aka Tom Riddle): The ultimate antagonist of the entire series, his return is orchestrated in this book. He manipulates events and uses Barty Crouch Jr. as his pawn to get Harry into the Triwizard Tournament. He also uses Peter Pettigrew (Wormtail) to regain his physical body.
* Page numbers: Mentions of Voldemort's return and his manipulation of events are scattered throughout the book, starting with the Triwizard Tournament announcement (page 38) and the appearance of his mark on Harry's arm (page 101).
Barty Crouch Jr.: The main antagonist in the book, disguised as Mad-Eye Moody and serving Voldemort. He uses his position to ensure Harry's participation in the tournament and ultimately aims to lure him to Voldemort.
* Page numbers: Crouch Jr. is introduced on page 121 as the Defense Against the Dark Arts teacher, and his true identity is revealed on page 579. His actions and manipulations throughout the book are central to the plot.
Peter Pettigrew (Wormtail): Voldemort's faithful servant, he helps Voldemort regain his physical form.
* Page numbers: Pettigrew is first introduced on page 488, disguised as Scabbers the rat. His true nature and role in Voldemort's revival are revealed on page 605.
The Death Eaters: Voldemort's followers, they are responsible for several attacks and contribute to the chaos and fear surrounding the events of the book.
* Page numbers: The Death Eaters' attacks and their presence in the book are mentioned in multiple places, including the graveyard scene on page 609 and their gathering in the Ministry of Magic on page 679.
Harry Potter: The main protagonist, he is thrust into the Triwizard Tournament against his will and faces many dangerous challenges. He also has to deal with the return of Voldemort and the looming threat of war.
* Page numbers: Harry's journey through the Triwizard Tournament and his encounters with the antagonists are central to the book, starting with his selection as a champion on page 40 and culminating in the confrontation with Voldemort on page 619.
Hermione Granger: Harry's best friend and a key player in the events of the book. She uses her intelligence and resourcefulness to help Harry navigate the dangers of the Triwizard Tournament and uncover the truth about Voldemort's return.
* Page numbers: Hermione's role is crucial in the book, from her research about the tournament (page 45) to her participation in the final confrontation with Voldemort (page 628).
Ron Weasley: Harry's loyal friend, he remains by Harry's side throughout the events of the book, offering support and encouragement. He also plays a part in the investigation and fight against Voldemort.
* Page numbers: Ron's presence and support are evident throughout the book, including his participation in the Triwizard Tournament tasks (page 473) and his fight against the Death Eaters (page 679).
Other characters:
* Albus Dumbledore: The headmaster of Hogwarts, he plays a vital role in protecting Harry and guiding him.
* Sirius Black: Harry's godfather, he provides crucial support and information.
* Neville Longbottom: Harry's classmate, he shows bravery and plays a significant role in fighting the Death Eaters.
* The Order of the Phoenix: A secret organization dedicated to fighting Voldemort, they play a crucial role in protecting Harry and gathering information.
This is a summary of the main antagonists and protagonists. The book explores the complex dynamics and motivations of each character, and their actions contribute to the overall storyline.