With the appearance and demeanor of an elementary school, Sayuri is often mistaken as one despite being a student at Aomori High. Despite her petite appearance, Sayuri is the Bancho of the school having built a reputation its strongest physical fighter. She originally targets Rokudou for his inexplicable ability to become popular with the female students of Amori High, but when she begins her attack on him, she becomes enamored with him due to his spell's power. Rokudou thus becomes her first love. Through the influence of Rokudou, she reforms and reintegrates back into school life and helps him achieve his dream of a peaceful life by means of her powerful influence over her classmates. She has since become a powerful ally of Rokudou and one of the first to jump to his aid when matters involving outside delinquents befall him or Amori.Her name, Sayuri, means Lily in Japanese.