Rules:
- Your aim is to get your favourite characters on top of the list.
- Each time you make a post, you are allowed to move three (or less) characters of your choice one row upwards (consequently the characters which were above those slip one row down).

If we included ALL of the characters, it would be much more than a hundred, so I've chosen the 50 characters I think are most "important".
We start with alphabetical order:

01. Albus Dumbledore
02. Argus Filch
03. Arthur Weasley
04. Barty Crouch junior
05. Bellatrix Lestrange
06. Bill Weasley
07. Cedric Diggory
08. Cho Chang
09. Colin Creevey
10. Cornelius Fudge
11. Dobby
12. Dolores Umbridge
13. Draco Malfoy
14. Dudley Dursley
15. Filius Flitwick
16. Fleur Delacour
17. Fred Weasley
18. George Weasley
19. Gilderoy Lockhart
20. Ginny Weasley
21. Harry Potter
22. Hermione Granger
23. Horace Slughorn
24. James Potter
25. Kreacher
26. Lavender Brown
27. Lily Potter
28. Lord Voldemort
29. Lucius Malfoy
30. Luna Lovegood
31. Mad-Eye Moody
32. Minerva McGonagall
33. Molly Weasley
34. Narcissa Malfoy
35. Neville Longbottom
36. Nymphadora Tonks
37. Percy Weasley
38. Petunia Dursley
39. Pomona Sprout
40. Regulus Black
41. Remus Lupin
42. Ron Weasley
43. Rubeus Hagrid
44. Rufus Scrimgeour
45. Sirius Black
46. Severus Snape
47. Sybill Trelawney
48. Vernon Dursley
49. Victor Krum
50. Xenophilius Lovegood