The only daughter of Im Do-jeong. She is aware of the truth behind the Annals but seeks to keep it hidden. The only daughter of Im Do-jeong. She is aware of the truth behind the Annals but seeks to keep it hidden.

The Chief State Councillor (Yeonguijeong) of the Joseon court. A tragic figure whose wife died under mysterious circumstances, leaving him with his only daughter, Seo-rim. He discovered the records of the creature and is now plotting a conspiracy with Seo-rim. The Chief State Councillor (Yeonguijeong) of the Joseon court. A tragic figure whose wife died under mysterious circumstances, leaving him with his only daughter, Seo-rim. He discovered the records of the creature and is now plotting a conspiracy with Seo-rim.

A court lady unlike the others; she cannot suppress her curiosity and explores every corner of the palace to uncover its secrets. A court lady unlike the others; she cannot suppress her curiosity and explores every corner of the palace to uncover its secrets.

An archer in Hanyang known for causing trouble. An orphan who lost his parents at a young age, he was close to Yun Nam as a child, but due to their difference in social status, they now only exchange brief greetings. An archer in Hanyang known for causing trouble. An orphan who lost his parents at a young age, he was close to Yun Nam as a child, but due to their difference in social status, they now only exchange brief greetings.