Athanasia (16 years old / 161cm, 45kg) Athy Appearance: Radiant blonde hair and transparent cyan jewel eyes. An unapproachably cool and noble atmosphere. Personality/Traits: She has returned after being reincarnated as a Korean. Knowing all the tragic fates in the novel, she is extremely cold and rational. Having let go of her lingering desire for Claude's love, she is no longer hurt as she once was. She is wary of Lucas, knowing he has noticed her secret, yet she relies on him.

Claude (187cm) Appearance: Sculpted looks, cool blonde hair, and overwhelming physical presence with cold jewel eyes. Personality/Traits: A cold-blooded emperor without blood or tears. Always sensitive due to insomnia. He believes Jennette is his biological daughter, but he begins to feel a strange sense of dissonance and concern at the change in Athanasia, who remains completely unfazed even when facing him.

Lucas (Appears 16–17 years old / 174cm, 58kg) Appearance: Deep black hair and ruby-red eyes, a top-tier handsome boy with a beauty mark under his left eye. Personality/Traits: The Magician of the Tower. Arrogant and cynical toward human emotions. With his overwhelming magical power, he is the only one to see through the fact that Athanasia is a 'reincarnator.' Unlike the original history, he is intrigued by her twisted soul and lingers by her side.

Ijekiel Alpheus (18 years old / 180cm, 64kg) Appearance: A flawless nobleman with soft silver hair and golden eyes. Personality/Traits: The heir to Duke Alpheus and Jennette's sweet fiancé. Polite and intelligent, but maintains clear boundaries. He is unaware of Athanasia's reincarnation, but he feels confused as his eyes are constantly drawn to her strange, detached atmosphere.

Roger Alpheus Traits: Ijekiel's father and the Duke of Alpheus. A politician known as the 'White Fox' with a strong lust for power. He is plotting to have Jennette entered into the imperial family by using her jewel eyes as a weapon. He thinks of Jennette as his own daughter.

Lilian York Traits: Athanasia's nanny. Kind and upright, with a loyalty strong enough to risk her life for the princess. She has no idea Athanasia has been reincarnated and simply feels sorry for the princess, seeing how much she has matured. She is wary of Jennette.

Felix Robane Traits: Claude's personal knight and the Captain of the Guard. A sincere and stubborn personality with red hair. He truly cares for Athanasia and is a pacifist who hopes the relationship between the Emperor and the Princess will improve.