Kaori Hanazono ( 花園 かおり , Hanzono Kaori ) is Kōsaku 's classmate.Ch. 23 She is jealous of Hibari 's popularity at school , Ch . 6 and take pride in her devious personality.Ch. 7 , 27 Along with her three friends , they try to embarrass Hibari.Ch. 24 , 27 Kaori is voiced by Seiko Nakano .