He is driven by a seething desire for vengeance and justice, and was determined to bring about the demise of the tyrannical ruler he served: Michael Kaiser. After witnessing the atrocities inflicted upon those he cared for by the monarch's forces, Isagi joined a rebellion that sought to dethrone the king and restore peace to the land. As the rebellion's mole was assigned with the task of assassinating Michael Kaiser, Isagi had come face to face with the monarch to whom he bore a great grudge.