Enrolled in Abydos High School, Shiroko is the sports-loving field captain of the Countermeasure Council. Generally a girl of few words and few emotions, she gives off an aloof aura but holds the interest of Abydos above all else. In order to revitalize the school, she is willing to do anything, and occasionally comes up with ridiculous plans.

Iris, the young woman with blue hair and sky-blue eyes, stands out with her fake animal ears and collared shirt.

Hatsune Miku (Japanese: 初音ミク), officially code-named CV01,[2][3] is a Vocaloid software voicebank developed by Crypton Future Media and its official anthropomorphic mascot character, a 16-year-old girl with long, turquoise twintails.

is a young mangaka who creates the Rufurufu manga and a neighbor of the Saotomes. (Sauce: Saotome Shimai Ha Manga no Tame Nara!?)