The official site for this summer's theatrical film anime Blood-C: The Last Dark, got an update including additional cast and staff.
We knew previously that Nana Mizuki and Kenji Nojima would reprise their roles (Saya and Fumito, respectively) from the TV series, but here are some more characters and cast members...
Fashion model/actress Ai Hashimoto plays Mana Hiiragi:
Yūki Kaji (Shion in No. 6, Amata Sora in Aquarion Evol) plays Shun Fujimura:
Kana Hanazawa (Mayuri Shiina from Steins;Gate, Nadeko Sengoku from Bake/Nisemonogatari) plays Hiro Tsukiyama:
Masumi Asano also returns as Yūka Amino from the TV show:
Junichi Suwabe (Seiji Matoba from Natsume Yūjinchō, Tsunenaga Tamaki from Deadman Wonderland) plays Kutō:
Staff as follows...
Original work: Production I.G/CLAMP
Original story/character planning: CLAMP
Script: Nanase Ōgawa (from CLAMP), Junichi Fujisaku (who also worked on the TV script)
Direction: Naoyoshi Shiotani (who did key animation on the TV series)
Anime Character Design, Overall Animation Direction: Kazuchika Kise (who did character designs and more on the TV show)
Production Chief: Norihiro Naganuma (lots of work on Kimi ni Todoke)
Animation Direction: Takahiro Chiba, Tōru Ōkubo, Miyuki Nakamura, Kanako Sasa, Takahiro Kagami, Yuji Hosogoe
Art Direction: Kazuo Ogura (Read or Die, Welcome to the Space Show)
Color Design: Narumi Sakai (who also did it for the TV show)
3DCGI: Dandelion Animation Studio
Photography Direction: Eiji Arai (who also did it for the TV show)
Sound Direction: Yoshikazu Iwanami (who also did it for the TV show)
Music: Naoki Sato (same as TV show)
Music Production: Aniplex
Theme Song: Nana Mizuki
Production: Production I.G