Tsukimichi Natsui

Tsukimichi Natsui is Azuki's hard-working brother. In the manga, he works at a confectionery company, developing candy. When they were younger, Azuki and Tsukimichi's father died and Tsukimichi promised to become a candy-maker and be Azuki's male role-model. He greatly dislikes Shinjuurou as a result of his protectiveness towards Azuki. (Source: Wikipedia)