Crunchyroll previously reported on the development of the light-novel-to-anime adaptation called Ore ga Ojōsama Gakkō ni "Shomin Sanpuru" Toshite Gettsu Sareta Ken, known in English as I Was Kidnapped As a 'Sample Commoner' for a Princess School. Now the character designs for the principal cast have been released. They include: 

Kimihito Kagurazaka, the titular kidnapped sample commoner, played by voice actor Atsushi Tamaru.

Aika Tenkūbashi, a girl who takes a shine to Kimihito, played by voice actor Yū Serizawa.

Reiko Arisugawa, Aika's rival for Kimihito's attention, played by voice actor Rika Tachibana.

Karen Jinryō, a girl from a samurai family who considers Kimihito her enemy, played by voice actor Chitose Morinaga.

Hakua Shiodome, a child prodigy who is anti-social with everyone except Kimihito, played by voice actor Yūki Kuwahara.

Miyuki Kujou, Kimihito's "maid", played by voice actor Saori Ōnishi.

And Eri Hanae, Kimihito's childhood friend, played by voice actor Yumi Hara.

The I Was Kidnapped As a 'Sample Commoner' for a Princess School anime is directed by Masato Jinbo and features animation by Silver Link. It will begin broadcasting in October of 2015 on AT-X, BS Fuji, TOKYO MX, Sun Television, and KBS Kyoto.

Source: Akiba-souken.com

Paul Chapman is the host of The Greatest Movie EVER! Podcast and GME! Anime Fun Time.