Kyonosuke Kaoru (薫 京ノ介,Kaoru Kyonosuke?) is a PE teacher at Hakuo Academy. He is usually seen building Gunpla in the staff room or during lunch. He spends the most of his money buying Gunpla. He is 28 years old but he is still single and without a girlfriend. Though it is revealed later on that he has feelings for Yukiji Katsura, who he has known from childhood.
Kyonosuke has brown hair and grey eyes. He wears a tracksuit jacket and jogging pants while teaching at Hakuo Academy and even while building Gundam models.
Kyonosuke's appearance is very rare. During the Golden Week vacation, he and Yukiji Katsura went to Italy. While staying there, Kaoru confesses to Yukiji. Just like the other characters, he and Yukiji went to Japan together.In the first episode of the second season of Hayate No Gotoku, Kaoru ran with Yukij in the Freestyle race.