Aoki Daisuke is a supporting character in Kodomo no Jikan. He is the teacher of class 3-1, one of the third grade classes at Futatsubashi Elementary School. In the second season of the anime, he becomes the teacher of class 4-1, one of the fourth grade classes. Of the students that he teaches, the few we actually get to know are Kokonoe Rin, Kagami Kuro, and Usa Mimi. Throughout the series, Aoki struggles with Rin above all others, because Rin has a crush on him, and isn't afraid to show it. This causes Aoki to have to push Rin away, because he is afraid that if any of the other members of staff see this, he could lose his job.