King Ranze rules the Kingdom of Wimburg. He survived an assassination attempt by the Kaiser Empire, which utilized the enslaved catgirl Oliga Calmeria as its assassin. Seiichi Hiiragi thwarted this plot, capturing Oliga and freeing her from enslavement. As king, Ranze commands Wimburg's most prestigious military unit, the Valkyries, led by Louise Balze. Under his leadership, Wimburg stands opposed to the morally corrupt Kaiser Empire, known for enslaving otherworldly summoners and exploiting its power. Ranze's kingdom harbors generally good-natured citizens, contrasting with the corrupt nobility depicted in neighboring realms.