Nio Hashiri

Nio Kuzunoha, most commonly known by her alias Nio Hashiri throughout the series, is the secondary antagonist of the manga and anime series Akuma no Riddle. She was a student of Myōjō Academy's 10th year's Black Class. Unlike the other students, who were trying to kill Haru Ichinose to get their desires granted, Nio was the class arbitrator and overseer of the assassins, working directly under the chairwoman. Nio has short blond hair and has big reddish-orange eyes. She is always seen wearing a school uniform just like all the other students outside of the Black Class. Her uniform consists of a black short sleeve blazer with yellow lining and she wears a white long sleeve button up shirt under her blazer with a red short skirt and a big red bow. She also wears high-thigh black socks and black shoes. Hidden under all of her clothing, she has bird-like tattoos that cover most of her body. Nio's a girl with a twisted and wicked personality. At first glance, Nio appears to be a very cheerful and friendly girl with a gleeful disposition. However, her true self is quite more cruel and sadistic, and she feels pleasure by making others suffer after herself or seeing them suffering. She is very manipulative, and can sway others to help her, only to betray them later on. Throughout the manga, she is shown to be adverse to shows of affection, calling Chitaru and Kirigaya "gross" for kissing multiple times. However, she is capable of sharing genuine kindness to certain individuals. It is also worth noting that, despite her apparent disgust at love, she is shown to think of it often in chapter 1 of Koakuma no Riddle. She claims she deludes herself into believing it is disgusting and ignoring her true feelings. These feelings are directed towards the Chairwoman, but Nio claims this is in fact devotion that the Chairwoman mistakes for love.