Kiyoka Kudou （久堂清霞，Kudo Kiyoka？）is the male protagonist of the My Happy Marriage series. He is the head of the Kudou family, the second child and only son of Tadakiyo Kudou and Fuyu Kudou, the commander of the Special Anti-Grotesquerie Unit and the fiancé of Miyo Saimori. He is described as a "ruthless soldier." Anyone who becomes his fiancée runs away after just three days. At first, he doesn't seem to care much about Miyo but then he starts to care about her and is more flexible and affectionate with her. He helps her find justice against Kanoko, Kaya and Shinichi (Miyo's estranged father), especially, the former head of the Tatsuishi family: Minoru Tatsuishi.