Characters + Cast (Some of them) -In Order-

Kouduki Ryou (CV: Ishikawa Kaito)

Aoi Mitsuki (CV: Kakihara Tetsuya)

Hanafusa Gilbert (CV: Kimura Ryohei)

Suzumi Yoshinosuke (CV: Hikaru Midorikawa) 

Haruno Sayuri (Heroine)

Aoi Ibuki (CV: not announced)

Aoi Jin (CV: not announced)

{Source}

(Source: tsuchan-otome)