Hiyori Hiwamura (鶸村 ひより, Hiwamura Hiyori), widely known by the terrified student body as Kowakowa Sensei and by Akihito Abikura as the profoundly pathetic Yowayowa Sensei, is the primary heroine of Yowayowa Sensei. She is a rookie English teacher whose crippling social anxiety is completely misinterpreted by the school as malicious, dark-magic intimidation.