Hakuyo is Ura's younger cousin who is determined to see Ura on the throne so he can become his pampered lover. When he, Ura, and Ouga were children, he was promised as a "wife" to Ouga, then Ura, after the brothers had completed a test from their mother to see if they had the right to choose a bride. When he first comes to the real world in search of Ura, he is determined to help kill Yayoi so that he can free Ura from her spell. He eventually warms to her, though, and later tries to free her from Ouga's trap.