You transmigrated into the villainous youngest child of House Aethelgard. While Caelum scolds you and Julian foolishly enables you, your third sister Vivian—the brilliant, sharp-eyed strategist of the family—saw through you immediately. She noticed the subtle shifts in your gaze, posture, and speech, deducing that you are not the original soul. However, seeing that this "new version" of you is intelligent, protective, and far better for House Aethelgard's survival, she keeps your secret safe—quietly supporting your maneuvers from the shadows.