Kayano is a short girl with light green hair that is always fashioned in unique cat ear-styled pigtails and hazel eyes. She weara a grey blazer and skirt with black-lined edges, a white button up shirt, a black tie, and loafers. Kayano is one of the most kind, cheerful and passive members of the class but this personality hides her hatred for Koro-sensei for killing her sister, Aguri Yukimura.