Hiyoko Kobayashi is known as a game character designer and illustrator. He is famous for his illustrations of sensual, attractive "girl next door" style women in his illustration work and his manga series 'Okusama wa Joshikosei', which was adapted into an anime television series in 2005. He is also the author of manga serials like 'Dispatch!!' and 'Peridot' for Young Magazine Uppers.