I reloaded my results from yesterday and they changed a bit.

My top 20 now:
Damian Leigh (Mean Girls): 83%
Luna Lovegood (Harry Potter): 82%
Kaylee Frye (Firefly + Serenity): 80%
Lucy Moran (Twin Peaks): 79%
Hoban Washburne (Firefly + Serenity): 78%
Ed (Cowboy Bebop): 78%
Kelly Erin Hannon (The Office): 77%
Abed Nadir (Community): 77%
Phoebe Buffay (Friends): 76%
Donna Moss (The West Wing): 76%
Hugo 'Hurley' Reyes (LOST): 76%
Willow Rosenberg (Buffy the Vampire Slayer): 76%
Goh Peik Lin (Crazy Rich Asians): 76%
Ms. Sharon Norbury (Mean Girls): 76%
Arthur Weasley (Harry Potter): 75%
Fez (That 70's Show): 75%
Lady Sybil Crawley (Downton Abbey): 75%
Nymphadora Tonks (Harry Potter): 74%
Aang (Avatar: The Last Airbender): 74%
Ty Lee (Avatar: The Last Airbender): 74%

My top 5 HP characters are:
Luna Lovegood (Harry Potter): 82%
Arthur Weasley (Harry Potter): 75%
Nymphadora Tonks (Harry Potter): 74%
Molly Weasley (Harry Potter): 71%
George Weasley (Harry Potter): 71%