Taken characters, and links to their askblogs:

Ask Harry Dresden
Ask Karrin Murphy
Ask Molly Carpenter
Ask Michael Carpenter
Ask Thomas Raith
Ask Charity Carpenter
Ask Waldo Butters
Ask Leanansidhe
Ask Gentleman Johnnie Marcone
Ask Hendricks
Ask Bob the Skull
Ask Nicodemus Archeleone
Ask The Archive (Ivy)
Ask Kincaid
Ask Chandler (AKA Steed)
Ask Warden Carlos Ramirez
Ask Grimalkin
Ask Ebenezer McCoy
Ask He Who Walks Behind
Ask Mouse the Dog
Ask Justine

If you’d like to join, and then if you’re having trouble thinking for a character, try here. A quick list of some main characters we don’t have:

Morgan
Luccio
Susan Rodriguez
Sanya
Uriel
Father Forthill
Marva
Bianca
Lara Raith
Mab
Toot-Toot
Fix
Lily
Gard
Elaine
The Alphas (particularly Billy(or Will) and Georgia)
Mortimer Lindquist
Justine

Please note that if a character appears in the Dresden Files novels or short stories and isn’t already taken, they are fair game, whether they’re on the list above or not. I just threw out some major players who we don’t have yet.