Yoshiko Nishitani

Yoshiko Nishitani was a pioneering shjo manga artist who released her works in Shoujo Club and Margaret. According to Rachel Thorn Nishitani more or less singlehandedly invented the school campus romance that remains the mainstay of shoujo manga today and Robert Petersen regards her innovation as giving her characters personality. Her success inspired an influx of female manga artists. Her manga Mary Lou is thought to have opened up the idea of shjo manga telling stories about ordinary teenagers.Source: Wikipedia