Step into the enchanting world of Hogwarts, where magic intertwines with everyday life and extraordinary characters captivate our imaginations. Join me on a mesmerizing journey through the pages of "Harry Potter and the Half-Blood Prince" as we delve into the diverse cast of characters, each bringing their own unique charm and pivotal role to this beloved tale. From the first encounters that spark the magic to the unfolding of destinies, let's unravel the captivating story of these characters in order of appearance, revealing the essence of their roles within this fantastical realm. Prepare to be spellbound as we embark on a thrilling adventure that will leave you yearning for more.

1. Lord Voldemort (Tom Riddle): Voldemort doesn't physically appear much in this book, but his presence is felt throughout. His past is explored in detail through Dumbledore's memories.
2. Bellatrix Lestrange: Voldemort's most devoted Death Eater. She's involved in the battle at the end of the book.
3. Narcissa Malfoy: Draco's mother, who is worried for her son's life and makes Snape promise to protect him.
4. Severus Snape: The Potions Master who becomes the Defense Against the Dark Arts teacher. He makes an Unbreakable Vow to Narcissa to protect Draco. He kills Dumbledore at the end of the book.
5. Draco Malfoy: He is assigned a task by Voldemort to kill Dumbledore. He's seen struggling with this task throughout the book.
6. Harry Potter: The protagonist, who becomes close with Dumbledore and learns about Voldemort's past. He also excels in Potions thanks to the Half-Blood Prince's textbook.
7. Albus Dumbledore: Hogwarts headmaster, who shows Harry memories of Voldemort's past. He's killed by Snape at the end of the book.
8. Cornelius Fudge: The former Minister for Magic, who informs the Muggle Prime Minister about the dangers the wizarding world is facing.
9. Rufus Scrimgeour: The new Minister for Magic, who tries to persuade Harry to support the Ministry.
10. Horace Slughorn: The new Potions teacher, who holds key information about Voldemort's Horcruxes.

11. Ron Weasley: Harry's best friend, who becomes Keeper on the Gryffindor Quidditch team and dates Lavender Brown, causing tension between him and Hermione.
12. Hermione Granger: Harry's other best friend, who is hurt by Ron's relationship with Lavender and helps Harry with his suspicions about Malfoy.
13. Ginny Weasley: She plays a more significant role in this book, dating Dean Thomas and then Harry. She also joins the Quidditch team.
14. Fred and George Weasley: They are seen running their successful joke shop, Weasleys' Wizard Wheezes.
15. Molly Weasley: She is seen worried for her family's safety because of the Second Wizarding War.
16. Arthur Weasley: Works at the Ministry and is also worried about his family's safety.
17. Fleur Delacour: Now engaged to Bill, much to Molly's disapproval.
18. Bill Weasley: Works for the Order and gets seriously injured by Fenrir Greyback in the battle at the end of the book.
19. Remus Lupin: Appears in a few Order meetings and is involved in the battle at the end of the book.
20. Nymphadora Tonks: She is in love with Lupin and is also involved in the battle at the end of the book.

21. Kreacher: The Black family house-elf, who becomes friendlier with Harry after being given Regulus Black's locket.
22. Dobby: Helps Harry spy on Draco Malfoy.
23. Minerva McGonagall: The Transfiguration teacher and deputy headmistress, she provides Harry with career advice and supports him after Dumbledore's death.
24. Argus Filch: The Hogwarts caretaker, who is thrilled with the stricter discipline under Snape's regime.
25. Nearly Headless Nick (Sir Nicholas de Mimsy-Porpington): The ghost of Gryffindor House, who helps Harry understand the concept of ghosts.
26. Lavender Brown: Ron's girlfriend for a part of the book, causing tension between Ron and Hermione.
27. Dean Thomas: Ginny's boyfriend for a part of the book, causing tension between Harry and Ginny.
28. Seamus Finnigan: A Gryffindor student and a member of Dumbledore's Army. He shares the dormitory with Harry and Ron.
29. Neville Longbottom: A Gryffindor student, member of Dumbledore's Army, and a close friend of Harry, Ron, and Hermione.
30. Parvati Patil: A Gryffindor student and member of Dumbledore's Army, she is also Lavender's best friend.

31. Luna Lovegood: A Ravenclaw student and member of Dumbledore's Army, she continues to be a good friend to Harry.
32. Hagrid: The Care of Magical Creatures teacher and gamekeeper, who is hurt when Harry, Ron, and Hermione are unable to attend his classes due to their advanced workload.
33. Katie Bell: A Gryffindor student and member of the Quidditch team, who gets cursed by a necklace meant for Dumbledore.
34. Lee Jordan: The former Quidditch commentator, he is mentioned in passing.
35. Cormac McLaggen: A Gryffindor student who becomes the reserve Keeper on the Quidditch team and causes havoc during the one game he plays.
36. Romilda Vane: A Gryffindor student who tries to give Harry a love potion.
37. Madam Rosmerta: The owner of the Three Broomsticks, who is put under the Imperius curse by Malfoy to aid in his plan to kill Dumbledore.
38. Madam Puddifoot: The owner of a tea shop in Hogsmeade, mentioned in passing.
39. Professor Trelawney: The Divination teacher, who is dismissed from her post but remains at the school. She attempts to reenter the Room of Requirement and is crucial to Dumbledore's understanding of the vanishing cabinet's role.
40. Fenrir Greyback: A werewolf and Death Eater, who is involved in the attack on Hogwarts.
41. Rubeus Hagrid's Giant Spiders (Aragog's family): Aragog dies, and Hagrid and Slughorn hold a funeral for him.

42. Vincent Crabbe and Gregory Goyle: Malfoy's sidekicks, who help him in his attempt to kill Dumbledore by standing guard while he uses the Room of Requirement.
43. Moaning Myrtle: A ghost in Hogwarts, she comforts Malfoy when he's upset about his task to kill Dumbledore.
44. The Inferi: Reanimated corpses controlled by Voldemort, who attack Harry and Dumbledore in the cave where they seek a Horcrux.
45. Merope Gaunt: Voldemort's mother, who is seen in a memory.
46. Tom Riddle Sr. and the Riddles: Voldemort's father and grandparents, who are seen in a memory.
47. Morfin Gaunt: Voldemort's uncle, seen in a memory.
48. Hokey the House Elf: House elf of Hepzibah Smith, seen in a memory.
49. Hepzibah Smith: A wealthy witch from whom Voldemort steals Hufflepuff's cup and Slytherin's locket, seen in a memory.
50. Elphias Doge: An old friend of Dumbledore's, he is present at the funeral.
51. Aberforth Dumbledore: Albus Dumbledore's brother, mentioned in passing as the barman at the Hog's Head.
52. Peeves the Poltergeist: A mischievous spirit at Hogwarts, who causes chaos during the battle at the Astronomy Tower.
53. The Bloody Baron: The ghost of Slytherin House, mentioned in passing.
54. Madam Pomfrey: The school nurse who heals the students injured in the battle at the Astronomy Tower.
55. Aunt Petunia and Uncle Vernon Dursley: Harry's aunt and uncle, they are briefly seen in the beginning when Dumbledore picks Harry up from their house.
56. Dudley Dursley: Harry's cousin, who doesn't have a significant role in this book.
57. Madam Malkin: The owner of the robe shop in Diagon Alley, mentioned in passing.
58. Professor Sprout: The Herbology teacher at Hogwarts, who is seen teaching and helping to prepare for the battle.
59. Professor Flitwick: The Charms teacher at Hogwarts, who is seen teaching and also helping to prepare for the battle.
60. Grawp: Hagrid's half-brother, a giant who has become more civilized.
61. Percy Weasley: The third Weasley son, who has been estranged from his family due to his loyalty to the Ministry. He does not physically appear in the book but is mentioned.
62. Regulus Arcturus Black: Sirius Black's brother, who is revealed to have been a Death Eater and to have defected when he discovered Voldemort's use of a house-elf. His locket becomes a significant plot point.
63. Stan Shunpike: The conductor of the Knight Bus, who is mentioned as having been arrested on suspicion of Death Eater activities.