Kaku Un wears the armor of an Officer within the Qin military. He has a long goatee and is shown smiling.
He is shown to be quite cheerful, often teasing Heki about how their family spent big amounts of money for Heki's promotion to a General.
He makes his first appearance as a member of the Punitive Force Army under General Heki. Their mission is to suppress the rebellion in Tonryuu.