Ok I will join in (fun thread idea!)
Guild:
1- Lady Justice - Gina Carano (former Strikeforce womens champ, lead actress in Haywire)
2- Perdita Ortega - Mayra Leal (she was the naked girl in the begining of Machete, she looks like a much younger Eva Mendez)
3- Sonia Criid - Rose McGowan (From Charmed and a bunch of movies)
4- C. Hoffman - Joseph Gordon-Levitt (looper, inception, look at his IMDB and picture him bald )
5- Lucas McCabe - Alexander Skarsgård (Eric Northman from True Blood)
6- Lucius - doesn't much matter as he never takes off the mask.
Neverborn:
1- Lilith - Jessica Alba (I don't know why, but I think with blood red hair she'd be great)
2- Pandora -Deborah Ann Woll (Jessica in True Blood)
3- Zoraida- Jean Marsh (She was the evil queen in Willow, and she's still going strong )
4- Dreamer/LCB- Isaac Hempstead Wright (Bran from Game of thrones. LCB would be CGI voiced by Ron Perlman)
5- Jakob Lynch- Wil Wheaton, for fanboi points
6- Collodi- CGI voiced by Mike Patton (lead singer of Faith no More, did the voice of the darkness in the video game of the same name)
Arcanists:
1- Marcus- The Rock (WWE, bunch of movies)
2- Rasputina- Michelle Borth (Hawaii 5-0 tv series)
3- Collette- Claire Danes (many movies)
4- Ramos- Sean Connery
5- Mei Feng- Chiaki Kuriyama (she was the evil japanese sachoolgirl in Kill Bill 1)
6- Kaeris- Karolina Kurkova (played Cover Girl in GI Joe - Rise of Cobra)
Resurrectionists:
1- Nicodem- Jeff Bridges
2- Seamus- Gary Oldman
3- Kirai- Lucy Liu
4- Mc Mourning- Jeff Goldblum
5- Yan Lo- Sonnie Chiba
6- Molly- Anna Faris
Outcasts:
1- Viktoria(s)- Mila Jolovich
2- Leveticus- John Malkovich
3- Som'er Teeth- CGI, voiced by Ian Mcshane(deadwood)
4- Hamelin- Cillian Murphy (28 days later, batman begins)
5- Ophelia- CGI, voiced by Juliette Lewis (natural born killers)
6- Von Schill- Hugo Weaving (matrix, cpt america, V for Vendetta, ect)
Ten Thunders (see above plus):
Misaki- Michelle Yeoh (crouching tiger, hidden dragon and about a billion other movies)