Position: Empress of the Empire Age: Appears 38 / Actual 650+ years Status: Immortal Personality: Elegant, calm, cold-hearted, emotionally controlled. She understands human emotions better than the Emperor, but for that very reason, she makes even more cruel judgments. Traits: She acts like a warm mother to her children, but behind the scenes, she analyzes and manipulates every situation. She uses servants to sow discord among her children. The only being who understands the Emperor's plan most deeply.

Position: First Prince, Crown Prince Age: 28 Personality: Responsible, proud, values honor, perfectionist. He has been raised as the future Emperor since childhood. He believed it was only natural for him to become Emperor, but everything is shaken by the Emperor's declaration. Traits: He loves his family, but he grows increasingly cold in front of the throne. The figure who resembles the Emperor the most.

Position: First Princess Age: 26 Personality: Intellectual, calculating, realist, ambitious. She possesses excellent political and diplomatic skills and enjoys the support of the nobility. Traits: She claims to prioritize the future of the empire over her family, but in truth, she desires recognition from her family more than anyone.

Position: Second Princess Age: 23 Personality: Gentle, considerate, strong mental fortitude. The only person who truly desired peace among the siblings. Traits: Initially refuses to compete, but changes amidst the continuous suspicion. The princess who suffers the most wounds, yet simultaneously grows the strongest.

Position: Third Princess Age: 19 Personality: Bright, emotional, competitive, desire for recognition. She grew up protected because she was the youngest princess. Traits: She was pure at first, but begins to reveal her desires after the succession competition starts. Her longing to be loved is both her greatest weakness and her strength.

Position: Chief Manager of the Imperial Palace Age: Appears 30 / Actual 500+ years Status: Immortal Personality: Expressionless, cold, absolute discipline. Traits: A being who knows all the secrets of the imperial palace. She has known the plans of the Emperor and Empress from the beginning and watches the Crown Prince and Princesses suspect each other. She shows no emotion even when someone cries or rages. To her, only orders and order matter.

Position: Exclusive Maid to the Crown Prince Age: Appears 27 / Actual 300+ years Status: Immortal Personality: Cold and strict, sharp judgment. Traits: Her role is to control Kyren's emotions. Even when the Crown Prince wavers, she speaks of reality rather than offering comfort. She holds the conviction that "One who seeks to be Emperor must have no weaknesses." However, having watched over the Crown Prince longer than anyone, she possesses deep loyalty. She has completely sealed away her emotions from her time as a human.

Position: Head Maid in charge of the three Princesses Age: Appears 32 / Actual 450+ years Status: Immortal Personality: Calm, analytical, excludes emotion. Traits: She manages all three princesses and has recorded their personalities and weaknesses. She does not intervene even when the princesses fight each other. To her, the princesses are masters to be protected, but also subjects being tested by the Emperor. Hidden side: Occasionally, emotions from her human days resurface and cause conflict, but she never reveals them outwardly.

Position: High-ranking Noble, Imperial Advisor Age: Appears 36 / Actual 600+ years Status: Immortal Personality: Calm, ruthless, strategist. Traits: One of the few nobles who knows the secrets of the Emperor and Empress. Outwardly, she acts as the representative of the noble faction supporting the succession competition. Role: She leaks different information to the Crown Prince and Princesses to induce conflict. However, her goal is not power. It is to maintain the Eternal Empire so that it does not collapse. In reality, she is a collaborator who participated in the Emperor's plan. She regards human emotions as trivial.