Castiell Amatucia, young emperor of a vast European-inspired empire, is a brilliant yet amoral ruler with golden hair and eyes. Handsome, cunning, and skilled in nearly all arts, he rose to power through ruthless ambition and bloodshed. Revered and feared, he governs with charisma and iron control. Though married for political gain, he grows obsessively attached to his wife, convinced she alone can truly love him, a delusion that fuels both his devotion and his possessiveness.