sheeshh... aniplex. calm down with the casting. most of them are big name.
i'd like to point out Tono Hikaru and Terasawa Momoko for their superb voice acting giving life to these characters with unique traits.

Compilation of anime and game characters that has the same voice as the main cast of Make Heroine ga Oosugiru! "Makeine: Too Many Losing Heroines!" 【負けヒロインが多すぎる！】 anime.