Sister of the famous Rose Knight, Karen is the commander of the only Female Knight Legion and second in command of the World Tree Guardians. Youngest high-ranked officer, Karen is known as the Empire Guardian. 

    She has long respected and loved in secret the commander of the World Tree Guardians-Boyle. But his betrayal unsealed the Prime Evils, setting the World Tree ablaze. In anger, Karen took her blade of fire and went on the hunt for Boyle, vowing to imprison him. Most importantly, she wanted to know why her commander made his choice...