Kurihara, Chiyo

Chiyo is a pale-skinned teenage girl with shoulder-length brown hair that has square bangs hanging over her eyebrows, big brown eyes, full pink lips and Kiyoshi Fujino describes her as the cutest girl in the class that her cute outward appearance belies her strength.

She is usually seen wearing the standard female school uniform.

During her incarceration, she wears an oversize female prison uniform consisting of a striped short tank top and carpi pants until Kiyoshi lends her his more form-fitting prison uniform.

Chiyo is a kind & sweet girl who is notably one of the only female students that is not opposed to the admission of boys in Hachimitsu Academy.

She is an avid fan of sumo wrestling with the dedication to physically purchase tickets for a sumo student tournament. Her commitment to sumo wrestling is what inadvertently results in meeting Kiyoshi Fujino & befriending him. Chiyo's love of the sport is strong enough that she believes her grandmother's statement: "any fan of sumo wrestling cannot be evil".

(Source: Prison School Wiki)